[20648] Only run PRs CI when run-ci label is added (backport #4599)

[mergify]

Description

This PR changes the way Github CI is managed. From now on, to run CI, a label run-ci needs to be added to the PR. Once the CI starts, that label is removed and ci-pending one is added.

@Mergifyio backport 2.13.x 2.10.x 2.6.x

This PR depends on:

• [20648] Add remove_labels and add_labels actions eProsima-CI#80

Contributor Checklist

• Commit messages follow the project guidelines.

• N/A: The code follows the style guidelines of this project.

• N/A: Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added; the added tests pass locally

• N/A: Any new/modified methods have been properly documented using Doxygen.

• N/A: Changes are ABI compatible.

• N/A: Changes are API compatible.

• N/A: New feature has been added to the versions.md file (if applicable).

• N/A: New feature has been documented/Current behavior is correctly described in the documentation.

• Applicable backports have been included in the description.

Reviewer Checklist

• The PR has a milestone assigned.
• The title and description correctly express the PR's purpose.
• Check contributor checklist is correct.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.

---

This is an automatic backport of pull request #4599 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of d0a334b has failed:

On branch mergify/bp/2.6.x/pr-4599
Your branch is up to date with 'origin/2.6.x'.

You are currently cherry-picking commit d0a334b11.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   .github/workflows/reusable-mac-ci.yml
	modified:   .github/workflows/reusable-ubuntu-ci.yml
	modified:   .github/workflows/reusable-windows-ci.yml

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   .github/workflows/address-sanitizers.yaml
	both modified:   .github/workflows/documentation-tests.yaml
	both modified:   .github/workflows/mac-ci.yml
	both modified:   .github/workflows/thread-sanitizer.yaml
	both modified:   .github/workflows/ubuntu-ci.yml
	both modified:   .github/workflows/windows-ci.yml

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally