PART 2: ARM runners

[johnnynunez]

This pull request includes several updates to the GitHub Actions workflow configuration in the .github/workflows/tests.yml file. The changes primarily focus on adding support for different architectures and updating the versions of actions used.

Key changes include:

Architecture Support:

• Added arch parameter to the job names and matrix configurations to support x86_64 and aarch64 architectures. [1] [2] [3] [4] [5] [6]
• Introduced multiple new job configurations for ubuntu-20.04-arm with various Python versions and castxml settings. [1] [2]

Action Updates:

• Updated actions/checkout from version 3 to version 4.
• Updated actions/setup-python from version 4 to version 5.

[johnnynunez]

cc @thewtex @iMichka

[johnnynunez]

@iMichka 20.04 was deprecated this month so upgrade ubuntu(github runners) it's mandatory
obviously the tests arm failed because PART 1 must be marged