Usually, developers run a single test locally.
Disabling eager loading by default in test environment should increase
productivity since it saves around 10 seconds:

With `eager_load` as `true`:
```bash
bogdanvlviv@lenovo:~/gitlab-development-kit/gitlab$ bin/rspec spec/models/users_statistics_spec.rb
Run options: include {:focus=>true}

All examples were filtered out; ignoring {:focus=>true}

Test environment set up in 5.122837013 seconds
......

Finished in 8.51 seconds (files took 16.46 seconds to load)
6 examples, 0 failures
```

With `eager_load` as `false`:
```bash
bogdanvlviv@lenovo:~/gitlab-development-kit/gitlab$ bin/rspec spec/models/users_statistics_spec.rb
Run options: include {:focus=>true}

All examples were filtered out; ignoring {:focus=>true}

Test environment set up in 5.013345478 seconds
......

Finished in 8.24 seconds (files took 7.18 seconds to load)
6 examples, 0 failures
```

Inspired by https://github.com/rails/rails/pull/43508.

It is important to eager load app before deploying it to catch any
issues with constants loading.
I see that we disable eager_loading on CI, https://gitlab.com/gitlab-org/gitlab/-/merge_requests/30368/diffs#c1e8bf49d38a49639de4f3b2f3cef9ebdbe50dd4_16_26
For mentioned reason above I thik we should enable eager loading on CI.
@rymai What do you think about that?

I also found that we 'Speed up backend tests in Gitpod environment',
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/68482.
/cc @splattael

Remove `GITLAB_TEST_EAGER_LOAD: "0"` for scripts/setup-test-env
It doesn't make any difference for this script.
See https://gitlab.com/gitlab-org/gitlab/-/merge_requests/72964#note_713013642

Document `GITLAB_TEST_EAGER_LOAD`.
Closes https://gitlab.com/gitlab-org/gitlab/-/issues/343751

Update Django CI/CD template

See merge request gitlab-org/gitlab!73020

Add runner_features column runtime_runner_features

See merge request gitlab-org/gitlab!72378

Secure coding guidelines for dynamic method definition / metaprogramming

See merge request gitlab-org/gitlab!72575

Merge branch 'mwaw/fix-invalid-index_security_ci_builds_on_name_and_id_parser_features' into 'master'

Fix invalid index on ci_builds table

See merge request gitlab-org/gitlab!71990

Improve security report validation topic

See merge request gitlab-org/gitlab!73029

Put services keyword into new format

See merge request gitlab-org/gitlab!73018

Improve Vulnerability-Check docs

See merge request gitlab-org/gitlab!72946

Fix translation of title of ZenTao

See merge request gitlab-org/gitlab!72960

Card match to exclude holder name, but include network name

See merge request gitlab-org/gitlab!72574

Remove `action_mailer.default_url_options` override in development

See merge request gitlab-org/gitlab!72817

Switch to v-safe-html for notes in alert_details component

See merge request gitlab-org/gitlab!72876

Allowlist scope to remove spec-based list item

See merge request gitlab-org/gitlab!73037

List all card holder name in the table since they can be different.

Changelog: changed
EE: true

to include network, but not holder name.

Admin requested to display record with different holder name because
payment network may accept incorrectly entered holder name.

Revert "Merge branch 'yorick/clean-up-merge-request-diff-commits-migration' into 'master'"

See merge request gitlab-org/gitlab!73035

Alphabetized artifacts reports keywords

See merge request gitlab-org/gitlab!73022

Add a list of how account creation

See merge request gitlab-org/gitlab!73014

Fix `online_garbage_collection_spec.rb` QA failure

See merge request gitlab-org/gitlab!72888

Shrink cross-db spec allowlist

See merge request gitlab-org/gitlab!73031

Use namespace in the translation of the ZenTao title.

Changelog: changed
EE: true

Add mocha to javascript examples

See merge request gitlab-org/gitlab!72963

This reverts merge request !72219

Polish wording of Pseudonymizer UI

See merge request gitlab-org/gitlab!72613

Feature page styling

See merge request gitlab-org/gitlab!72976

Final shrinkage of spec allowlist, the rest arises from specs somehow,
with the exception of package specs which is known.

Reshape the text - what little there is - for the Pseudonymizer
option in the UI. Add a 'learn more' link for users who don't know
what this item is. Docs work is also needed, but that can happen
in the documentation.

Remove duplicate text from create group description

See merge request gitlab-org/gitlab!72954

Show linked pipelines mini graph in the pipeline editor

See merge request gitlab-org/gitlab!72967

Do not promise additional language support for Dependency Scanning

See merge request gitlab-org/gitlab!72966