breaking: updating protobuf version to 5.28.1

[nandiso123]

Description of changes:
Updated protobuf version to 5.28.1
Updated record_pb2.py to support protobuf changes
Upgraded tensorflow dependency in integration test docker file, as previous version did not support protobuf version to 5.28.1
Upgraded integration test docker python version to support protobuf version to 5.28.1 and updated record_pb2.py

Marking this change as a major version release - 5.0.0 (Need to be tagged when merged)

Testing done:
All unit tests are passing:

Wrote HTML report to htmlcov/index.html
  black-format: OK (3.20=setup[3.06]+cmd[0.14] seconds)
  flake8: OK (2.66=setup[2.15]+cmd[0.51] seconds)
  pylint: OK (3.09=setup[0.01]+cmd[3.08] seconds)
  twine: OK (2.76=setup[2.23]+cmd[0.27,0.26] seconds)
  py38: OK (234.17=setup[1.32]+cmd[231.78,0.31,0.76] seconds)
  py39: OK (233.08=setup[2.38]+cmd[229.65,0.31,0.74] seconds)
  py310: OK (231.21=setup[2.38]+cmd[227.81,0.29,0.72] seconds)
  congratulations :) (710.22 seconds)

All integration tests are passing

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[bhaoz]

to confirm - 3.8 is still supported right?

[nandiso123]

yes 3.8 is supported

[bhaoz]

do we have a guide on how to generated this pb cimplier?

[nandiso123]

This file was generated using bin/protoc —python_out=. record.proto

For some reason, record.proto is not in this package, but exists in other packages such as sagemaker-python-sdk

That record.proto was used to generate this file

[bhaoz]

Confirmed integ tests all passing for this repo