Add flags to build cryptography on rpm-x64

[FlorentClarret]

What does this PR do?

Add RUSTFLAGS, PIP_NO_BINARY and OPENSSL_DIR flags to build cryptography on rpm-x64

Motivation

We would like to bump cryptography in integrations-core. We end up with this error on rpm x64 builds (where pip build the wheel from source I believe, because none are available OOTB):

            [HealthCheck] I | 2023-08-11T06:28:02+00:00 | Running health on agent
            [HealthCheck] E | 2023-08-11T06:28:14+00:00 | Failed!
            [HealthCheck] E | 2023-08-11T06:28:14+00:00 | The following libraries have unsafe or unmet dependencies:
    --> /opt/datadog-agent/embedded/lib/python3.9/site-packages/cryptography/hazmat/bindings/_rust.abi3.so
            [HealthCheck] E | 2023-08-11T06:28:14+00:00 | The following binaries have unsafe or unmet dependencies:
            [HealthCheck] E | 2023-08-11T06:28:14+00:00 | The following requirements could not be resolved:
    --> libssl.so.1.1
    --> libcrypto.so.1.1
            [HealthCheck] E | 2023-08-11T06:28:14+00:00 | The precise failures were:
    --> /opt/datadog-agent/embedded/lib/python3.9/site-packages/cryptography/hazmat/bindings/_rust.abi3.so
    DEPENDS ON: libssl.so.1.1
      COUNT: 1
      PROVIDED BY: not found
      FAILED BECAUSE: Unresolved dependency
    --> /opt/datadog-agent/embedded/lib/python3.9/site-packages/cryptography/hazmat/bindings/_rust.abi3.so
    DEPENDS ON: libcrypto.so.1.1
      COUNT: 1
      PROVIDED BY: not found
      FAILED BECAUSE: Unresolved dependency
            [HealthCheck] I | 2023-08-11T06:28:14+00:00 | Health check time: 11.3807s
The health check failed! Please see above for important information.

This is related to pyca/cryptography#8614 (comment)

A job worked here (errors in the other jobs are related to the cat commands I added to debug) using my branch in integrations-core with cryptography 41.0.3

Additional Notes

I also need PIP_NO_CACHE_DIR and PIP_FORCE_REINSTALL because here we manually install snowflake AND its dependencies (since we blacklist it from the main file), including cryptography. Pip builds the wheel in the custom recipe without the flags, so without the link. When we try to build the wheel with the flags, cryptography is already installed so we just skip it. PIP_FORCE_REINSTALL is needed to uninstall/reinstall and PIP_NO_CACHE_DIR to avoid using the existing cached wheel that comes from snowflake, to make sure we build the wheel from source. I could have had the flags to the custom recipe instead but we hope to drop this custom recipe soon (even before we drop rpm x64, thanks to this if this gets merged)

I should have a shortcut for if redhat? && !arm?

Possible Drawbacks / Trade-offs

Describe how to test/QA your changes

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[pr-commenter]

Bloop Bleep... Dogbot Here

Regression Detector Results

Run ID: 4f88409d-9f2f-48be-a349-11ef79e8b544
Baseline: 5d5462e
Comparison: 32a454f
Total datadog-agent CPUs: 7

Explanation

A regression test is an integrated performance test for datadog-agent in a repeatable rig, with varying configuration for datadog-agent. What follows is a statistical summary of a brief datadog-agent run for each configuration across SHAs given above. The goal of these tests are to determine quickly if datadog-agent performance is changed and to what degree by a pull request.

Because a target's optimization goal performance in each experiment will vary somewhat each time it is run, we can only estimate mean differences in optimization goal relative to the baseline target. We express these differences as a percentage change relative to the baseline target, denoted "Δ mean %". These estimates are made to a precision that balances accuracy and cost control. We represent this precision as a 90.00% confidence interval denoted "Δ mean % CI": there is a 90.00% chance that the true value of "Δ mean %" is in that interval.

We decide whether a change in performance is a "regression" -- a change worth investigating further -- if both of the following two criteria are true:

1. The estimated |Δ mean %| ≥ 5.00%. This criterion intends to answer the question "Does the estimated change in mean optimization goal performance have a meaningful impact on your customers?". We assume that when |Δ mean %| < 5.00%, the impact on your customers is not meaningful. We also assume that a performance change in optimization goal is worth investigating whether it is an increase or decrease, so long as the magnitude of the change is sufficiently large.

2. Zero is not in the 90.00% confidence interval "Δ mean % CI" about "Δ mean %". This statement is equivalent to saying that there is at least a 90.00% chance that the mean difference in optimization goal is not zero. This criterion intends to answer the question, "Is there a statistically significant difference in mean optimization goal performance?". It also means there is no more than a 10.00% chance this criterion reports a statistically significant difference when the true difference in mean optimization goal is zero -- a "false positive". We assume you are willing to accept a 10.00% chance of inaccurately detecting a change in performance when no true difference exists.

The table below, if present, lists those experiments that have experienced a statistically significant change in mean optimization goal performance between baseline and comparison SHAs with 90.00% confidence OR have been detected as newly erratic. Negative values of "Δ mean %" mean that baseline is faster, whereas positive values of "Δ mean %" mean that comparison is faster. Results that do not exhibit more than a ±5.00% change in their mean optimization goal are discarded. An experiment is erratic if its coefficient of variation is greater than 0.1. The abbreviated table will be omitted if no interesting change is observed.

No interesting changes in experiment optimization goals with confidence ≥ 90.00% and |Δ mean %| ≥ 5.00%.

Fine details of change detection per experiment.

experiment	goal	Δ mean %	Δ mean % CI	confidence
otel_to_otel_logs	ingress throughput	+0.47	[-0.78, +1.71]	36.79%
tcp_dd_logs_filter_exclude	ingress throughput	+0.00	[-0.03, +0.03]	2.67%
trace_agent_msgpack	ingress throughput	+0.00	[-0.09, +0.09]	0.39%
trace_agent_json	ingress throughput	-0.03	[-0.12, +0.06]	32.68%
file_to_blackhole	egress throughput	-0.12	[-1.20, +0.96]	11.35%
uds_dogstatsd_to_api	ingress throughput	-0.52	[-1.49, +0.46]	50.33%
tcp_syslog_to_blackhole	ingress throughput	-0.92	[-1.03, -0.81]	100.00%

[alopezz]

I'm also hopeful that an unpatched snowflake will come in the near future which I'm hoping it will simplify some of this stuff.