Remove hacking dependency, capture version snapshot prior to CI testing

[kevin-bates]

This pull request removes hacking from the set of test dependencies, as it was found to side-affect linting in server dev environments that were not seen during CI (see #2670 for details) and its absence doesn't appear to break anything.

This change includes two other changes:

1. The redundant lint-related dependencies have been removed from test_requirements.txt as they're already included in lint_requirements.txt.
2. A Version Snapshot action has been added in the test-server job after dependencies have been installed and prior to running server tests. This equivalent information was inadvertently removed in CI Enhancements #1671.

How was this pull request tested?

1. Per Test-dependencies side-affect linting in server development environments #2670, a new conda env was created.
2. Then the branch for PR Add support for runtime image and env vars in pipeline default properties  #2656 was pulled (which contains the lining issue that surfaces using older flake8 versions)
3. make lint-server - passes
4. make clean install - passes
5. make test-dependencies lint-server - passes (it was this lint-server that failed with hacking in place).

Resolves: #2670

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[elyra-bot]

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[kiersten-stokes]

Working like a charm for me!

[karlaspuldaro]

Tested this out and I'm no longer seeing the hacking library issues on my env!