Only return MetaObject from AWSResource.MetaObject() call

[vijtrip2]

Issue #, if available: aws-controllers-k8s/community#937

Description of changes:

• For implementation of AWSResource.MetaObject, we were returning the complete resource.
• This change only returns 'ObjectMeta' from AWSResource which is the implementation of 'metav1.Object' inside resource struct
• returning only the relevant members helps in metadata comparison correctly with ackcompare.MetaV1ObjectEqual

---

• Unit tests successful
• Successful local kind e2e test for newly generated dynamodb controller

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

[RedbackThomson]

I believe we are using MetaObject as part of the adoption reconciler. Would you mind verifying these still work as intended, as well? Just a simple smoke test should suffice.

[vijtrip2]

I believe we are using MetaObject as part of the adoption reconciler. Would you mind verifying these still work as intended, as well? Just a simple smoke test should suffice.

Tested with sagemaker adopt_endpoint test and it passes

tests/test_adopt_endpoint.py::TestAdoptedEndpoint::test_smoke 
[gw0] [100%] PASSED tests/test_adopt_endpoint.py::TestAdoptedEndpoint::test_smoke 

[RedbackThomson]

Thanks!
/lgtm

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