ROX-25439: Change template and remove flag options

[mtodor]

Description

Removes feature flag functionality from the template and code. This PR requires parts 1-4 to be merged first. This reverts functionality added with #8636 for using feature flags in proto files.

This branch is based on mtodor/ROX-25439-remove-features-part4 - used in PR #12793

User-facing documentation

• [x] CHANGELOG is updated OR update is not needed
• [x] documentation PR is created and is linked above OR is not needed

Testing and quality

• [x] the change is production ready: the change is GA or otherwise the functionality is gated by a feature flag
• [ ] CI results are inspected

Automated testing

• [x] didn't change any tests

How I validated my change

I did run make go-generated-srcs - for GENERATE_PATH=central/deployment/datastore/internal/store/postgres/gen.go

[rhacs-bot]

Images are ready for the commit at 83cf052.

To use with deploy scripts, first export MAIN_IMAGE_TAG=4.6.x-672-g83cf052494.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 48.20%. Comparing base (db45ed4) to head (83cf052). Report is 16 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12794      +/-   ##
==========================================
- Coverage   48.20%   48.20%   -0.01%     
==========================================
  Files        2443     2443              
  Lines      175789   175780       -9     
==========================================
- Hits        84737    84730       -7     
+ Misses      84226    84225       -1     
+ Partials     6826     6825       -1     

Flag	Coverage Δ
go-unit-tests	48.20% <ø> (-0.01%)	:arrow_down:

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[mtodor]

@dashrews78 @stehessel I have adjusted this PR to remove support of "disable sub-tables in proto files by feature flags". Since it is not used, there is no need to keep code for it.

[openshift-ci[bot]]

@mtodor: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/ocp-4-16-nongroovy-e2e-tests	da0bd8c8156b2513d63136aa059442c933fe413f	link	false	/test ocp-4-16-nongroovy-e2e-tests
ci/prow/ocp-4-16-qa-e2e-tests	da0bd8c8156b2513d63136aa059442c933fe413f	link	false	/test ocp-4-16-qa-e2e-tests
ci/prow/ocp-4-16-operator-e2e-tests	da0bd8c8156b2513d63136aa059442c933fe413f	link	false	/test ocp-4-16-operator-e2e-tests
ci/prow/ocp-4-16-ui-e2e-tests	da0bd8c8156b2513d63136aa059442c933fe413f	link	false	/test ocp-4-16-ui-e2e-tests
ci/prow/ocp-4-16-scanner-v4-tests	da0bd8c8156b2513d63136aa059442c933fe413f	link	false	/test ocp-4-16-scanner-v4-tests
ci/prow/gke-ui-e2e-tests	da0bd8c8156b2513d63136aa059442c933fe413f	link	false	/test gke-ui-e2e-tests
ci/prow/gke-scanner-v4-tests	da0bd8c8156b2513d63136aa059442c933fe413f	link	false	/test gke-scanner-v4-tests
ci/prow/ocp-4-12-scanner-v4-tests	da0bd8c8156b2513d63136aa059442c933fe413f	link	false	/test ocp-4-12-scanner-v4-tests
ci/prow/ocp-4-12-ui-e2e-tests	da0bd8c8156b2513d63136aa059442c933fe413f	link	false	/test ocp-4-12-ui-e2e-tests

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[mtodor]

/test gke-nongroovy-e2e-tests