ref(docker): Consolidate all tests in the entrypoint.sh script

[gustavovalverde]

Motivation

There were some pending TODOs in CI of tests that were not available in out Docker entrypoint.sh, which allows more flexibility for running tests using environment variables.

This had an impact on further implementations of #7534
This also sets some ground for #7892 and #7541

PR Author Checklist

Check before marking the PR as ready for review:

• Will the PR name make sense to users?
• Does the PR have a priority label?
• Have you added or updated tests?
• Is the documentation up to date?

Complex Code or Requirements

• Not all tests are run with the same parameters, and the run_cargo_test() function could not be used.

Solution

• Move the test execution from CI to the entrypoint.sh
• Create new execution environment variables for missing tests
• Add an EXPERIMENTAL_FEATURES ARG and ENV to the Dockerfile, to allow the execution of tests with Experimental Features.

Testing

• Tests should give the same output, and also take a similar amount of time to run
• We should confirm rebuilding is not happening on different tests (except, maybe, the Experimental one)

Review

Anyone from DevOps. @upbqdn had an specific need for the TEST_FEATURES to be changed.

Reviewer Checklist

Check before approving the PR:

• Does the PR scope match the ticket?
• Are there enough tests to make sure it works? Do the tests cover the PR motivation?
• Are all the PR blockers dealt with?
  PR blockers can be dealt with in new tickets or PRs.

And check the PR Author checklist is complete.

Follow Up Work

This will also allow to build the experimental docker image easier (more of that work in another PR)