ref(actions): remove xmlsec step

[AdriiiPRodri]

Context

This pull request removes the steps related to the installation and management of the ‎xmlsec system dependencies from the ‎api-pull-request.yml GitHub Actions workflow. The motivation for this change is to streamline the workflow by eliminating unnecessary dependencies that are no longer required for the project’s operation.

Description

The following changes have been made:

• All steps responsible for installing ‎libxml2-dev, ‎libxmlsec1-dev, ‎libxmlsec1-openssl, and ‎pkg-config via ‎apt-get have been removed from the workflow.
• The step that previously updated the ‎poetry.lock file after a branch name change has been consolidated and simplified.
• The workflow now focuses on updating ‎poetry.lock only when there are relevant changes, and ensures this process is consistent for both pull request and push events.

Checklist

• Are there new checks included in this PR? Yes / No
  • If so, do we need to update permissions for the provider? Please review this carefully.
• Review if the code is being covered by tests.
• Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings
• Review if backport is needed.
• Review if is needed to change the Readme.md
• Ensure new entries are added to CHANGELOG.md, if applicable.

API

• Verify if API specs need to be regenerated.
• Check if version updates are required (e.g., specs, Poetry, etc.).
• Ensure new entries are added to CHANGELOG.md, if applicable.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

✅ All necessary CHANGELOG.md files have been updated. Great job! 🎉

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.22%. Comparing base (675698a) to head (9d3d5cc).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #8482       +/-   ##
===========================================
+ Coverage   75.19%   89.22%   +14.02%     
===========================================
  Files          72      198      +126     
  Lines        4725    16283    +11558     
===========================================
+ Hits         3553    14528    +10975     
- Misses       1172     1755      +583     

Flag	Coverage Δ
api	94.95% <ø> (?)
prowler	75.19% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
prowler	75.19% <ø> (ø)
api	94.95% <ø> (∅)

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