[AIRFLOW-6792] Remove _operator/_hook/_sensor in providers package and add tests

[mik-laj]

Hello,

I fixed small inconsistencies and added tests to avoid regression.

Best regards,
Kamil

@feluelle I also renamed aws_hook to base_aws. WDYT? In separate PR. I will rename airflow.providers.google.cloud.base to airflow.providers.google.common.base_google to unify names.

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Issue link: AIRFLOW-6792

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[feluelle]

LGTM 👍

..but why not just aws / google ? If we want to prefix it with base_ I would suggest to rename the class name also to BaseAwsHook. WDYT?

[mik-laj]

..but why not just `aws / google ?

This is too confusing because we also have packages that have the same name.

If we want to prefix it with base_ I would suggest to rename the class name also to BaseAwsHook. WDYT?

We currently have CloudBaseHook class, so maybe let's call AwsBaseHook and GoogleBaseHook. WDYT?

[feluelle]

We currently have CloudBaseHook class, so maybe let's call AwsBaseHook and GoogleBaseHook. WDYT?

I am fine with this 👍

[codecov-io]

Codecov Report

Merging #7412 into master will decrease coverage by 0.29%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #7412     +/-   ##
=========================================
- Coverage   86.66%   86.37%   -0.3%     
=========================================
  Files         878      877      -1     
  Lines       41219    41221      +2     
=========================================
- Hits        35722    35603    -119     
- Misses       5497     5618    +121

Impacted Files	Coverage Δ
...ow/providers/docker/example_dags/example_docker.py	100% <ø> (ø)
...w/providers/apache/pig/example_dags/example_pig.py	100% <ø> (ø)
...viders/docker/example_dags/example_docker_swarm.py	100% <ø> (ø)
.../providers/google/suite/operators/gcs_to_gdrive.py	100% <ø> (ø)
...irflow/providers/http/example_dags/example_http.py	100% <ø> (ø)
...cncf/kubernetes/example_dags/example_kubernetes.py	78.57% <ø> (ø)
...providers/google/cloud/example_dags/example_dlp.py	100% <ø> (ø)
...low/providers/yandex/hooks/yandexcloud_dataproc.py	100% <ø> (ø)
.../cloud/operators/cloud_storage_transfer_service.py	95.63% <100%> (ø)	⬆️
...flow/providers/amazon/aws/hooks/lambda_function.py	100% <100%> (ø)	⬆️
... and 43 more

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