Fully populate mock function environment variables

[edwardfoyle]

Issue #, if available:
#4635, #4234, #6548, #6533, #3124, #1378, #691

Description of changes:
Populates environment variables when running amplify mock function by:
1. Not leaking any system environment variables into the mock lambda execution
2. Providing reasonable defaults for common lambda env vars specified here (https://docs.aws.amazon.com/lambda/latest/dg/configuration-envvars.html#configuration-envvars-runtime)
3. Loading aws access keys from the profile that the CLI is currently configured to use
3. Resolving parameters specified in team-provider-info.json
4. Resolving parameters specified in parameters.json
5. Resolving parameters from other resources in the project (eg. API names, table names)
6. Override GraphQL API endpoint env var to local mock endpoint when mock api is running
7. Load “mock only” env vars from a .env file in the function’s directory

1-6 should provide reasonable defaults for most customers and 7 provides a simple mechanism for customers to override / add environment variables only in the context of mock

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #6551 (f909b2b) into master (819a749) will decrease coverage by 0.01%.
The diff coverage is 42.32%.

@@            Coverage Diff             @@
##           master    #6551      +/-   ##
==========================================
- Coverage   56.93%   56.92%   -0.02%     
==========================================
  Files         484      484              
  Lines       21904    22014     +110     
  Branches     4373     4401      +28     
==========================================
+ Hits        12472    12531      +59     
- Misses       8551     8604      +53     
+ Partials      881      879       -2     

Impacted Files	Coverage Δ
packages/amplify-cli-core/src/index.ts	95.00% <ø> (ø)
packages/amplify-cli/src/context-extensions.ts	31.29% <0.00%> (ø)
packages/amplify-cli/src/domain/amplify-toolkit.ts	2.94% <ø> (+0.02%)	⬆️
...lify-nodejs-function-runtime-provider/src/index.ts	0.00% <0.00%> (ø)
...function-runtime-provider/src/utils/invokeUtils.ts	100.00% <ø> (ø)
...nction-runtime-provider/src/utils/legacyPackage.ts	0.00% <0.00%> (ø)
...il-mock/src/CFNParser/resource-processors/index.ts	0.00% <0.00%> (ø)
...l-mock/src/CFNParser/resource-processors/lambda.ts	0.00% <0.00%> (ø)
...kages/amplify-util-mock/src/__e2e__/utils/index.ts	0.00% <0.00%> (ø)
...plify-util-mock/src/__e2e__/utils/lambda-helper.ts	0.00% <0.00%> (ø)
... and 21 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2977c6a...f909b2b. Read the comment docs.

[lgtm-com]

This pull request introduces 1 alert and fixes 2 when merging 008e389 into 8647486 - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 1 alert and fixes 2 when merging d8b399e into a16e8b8 - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

fixed alerts:

• 2 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 1 alert and fixes 3 when merging baf49f4 into a16e8b8 - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

fixed alerts:

• 3 for Unused variable, import, function or class

[lgtm-com]

This pull request fixes 3 alerts when merging 3d9fe6c into a66bd14 - view on LGTM.com

fixed alerts:

• 3 for Unused variable, import, function or class

[jhockett]

LGTM

[lgtm-com]

This pull request fixes 3 alerts when merging 3fe813c into b866ccc - view on LGTM.com

fixed alerts:

• 3 for Unused variable, import, function or class

[lgtm-com]

This pull request fixes 3 alerts when merging 3e01644 into 31eb8eb - view on LGTM.com

fixed alerts:

• 3 for Unused variable, import, function or class

[lgtm-com]

This pull request fixes 3 alerts when merging f909b2b into 2977c6a - view on LGTM.com

fixed alerts:

• 3 for Unused variable, import, function or class

[github-actions]

This pull request has been automatically locked since there hasn't been any recent activity after it was closed. Please open a new issue for related bugs.

Looking for a help forum? We recommend joining the Amplify Community Discord server *-help channels for those types of questions.