[21162] Split example tests in different ctest tests

[JesusPoderoso]

Description

Current example tests are defined under the same pytest. That makes the "all examples" test fail if the timeout (300 sec) is reached. It didn't happen before but while including new examples (and their corresponding tests) this timeout has been reached.
This PR splits the pytest file with all example tests into different pytest files under different directories, so each of them would run independently with the same timeout (300 sec).
The corresponding compose file for each test has been configured in the same directoy on build time.

Note: This has been done assuming the name matches:

• compose file: example_name.compose.yml
• test_example_name.py

Contributor Checklist

• Commit messages follow the project guidelines.
• The code follows the style guidelines of this project.
• 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.
• Any new configuration API has an equivalent XML API (with the corresponding XSD extension)
• ❌ Changes are backport compatible: they do NOT break ABI nor change library core behavior.
• 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.
• N/A 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.

[Mario-DL]

LGTM with green CI