fix(parser): S3Model Object Deleted omits size and eTag attr

[barreeeiroo]

Issue number: #1637

Summary

Fixes S3 ObjectRemoved API event, as they don't include some attributes attributes.

Changes

• Flags eTag as optional attribute in S3Model.
• Flags size as optional attribute in S3Model.

Checklist

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• Meet tenets criteria
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• PR title follows conventional commit semantics

Is this a breaking change?

No.

Testing

Thanks @ran-isenberg for the unit tests! They are all passing:

Testing started at 21:33 ...
Launching pytest with arguments test_s3.py --no-header --no-summary -q in C:\Github\aws-lambda-powertools-python\tests\functional\parser

============================= test session starts =============================
collecting ... collected 6 items

test_s3.py::test_s3_trigger_event PASSED                                 [ 16%]
test_s3.py::test_s3_glacier_trigger_event PASSED                         [ 33%]
test_s3.py::test_s3_empty_object PASSED                                  [ 50%]
test_s3.py::test_s3_none_object_size_failed_validation PASSED            [ 66%]
test_s3.py::test_s3_none_etag_value_failed_validation PASSED             [ 83%]
test_s3.py::test_s3_trigger_event_delete_object PASSED                   [100%]

============================== 6 passed in 0.09s ==============================

Process finished with exit code 0

Acknowledgment

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Disclaimer: We value your time and bandwidth. As such, any pull requests created on non-triaged issues might not be successful.

[boring-cyborg]

Thanks a lot for your first contribution! Please check out our contributing guidelines and don't hesitate to ask whatever you need.
In the meantime, check out the #python channel on our AWS Lambda Powertools Discord: Invite link

[ran-isenberg]

LGTM

[codecov-commenter]

Codecov Report

Base: 99.76% // Head: 99.35% // Decreases project coverage by -0.40% ⚠️

Coverage data is based on head (8bfab74) compared to base (416ab1b).
Patch coverage: 87.56% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1638      +/-   ##
===========================================
- Coverage    99.76%   99.35%   -0.41%     
===========================================
  Files          127      128       +1     
  Lines         5884     5881       -3     
  Branches       668      373     -295     
===========================================
- Hits          5870     5843      -27     
- Misses           6       18      +12     
- Partials         8       20      +12     

Impacted Files	Coverage Δ
aws_lambda_powertools/shared/constants.py	100.00% <ø> (ø)
aws_lambda_powertools/utilities/batch/__init__.py	100.00% <ø> (ø)
aws_lambda_powertools/utilities/batch/base.py	97.79% <ø> (-1.48%)	⬇️
...ws_lambda_powertools/utilities/batch/exceptions.py	100.00% <ø> (ø)
aws_lambda_powertools/shared/cookies.py	58.69% <58.69%> (ø)
...bda_powertools/utilities/data_classes/alb_event.py	90.47% <60.00%> (-9.53%)	⬇️
...ambda_powertools/utilities/parameters/appconfig.py	94.28% <86.66%> (-5.72%)	⬇️
...s/utilities/data_classes/dynamo_db_stream_event.py	98.13% <95.45%> (-1.87%)	⬇️
aws_lambda_powertools/event_handler/api_gateway.py	100.00% <100.00%> (ø)
aws_lambda_powertools/shared/headers_serializer.py	100.00% <100.00%> (ø)
... and 8 more

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[boring-cyborg]

Awesome work, congrats on your first merged pull request and thank you for helping improve everyone's experience!