Improve CI

[vjik]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues

[what-the-diff]

PR Summary

• Ignore Non-Essential Directories in Workflow Triggers
  This change leads to some modifications in the workflow files (bc.yml, build.yml, composer-require-checker.yml, static.yml), where both pull_request and push events are set up to ignore certain paths. This way, the workflow won't get triggered when changes happen in non-essential areas.

• Filter Out Non-Master Branches on Workflow Activation
  The build.yml, composer-require-checker.yml, and static.yml files are all updated to ensure that their workflows are only launched for the master branch. This streamlines resources by not triggering these complex procedures for feature or experiment branches.

• PHP Version Upgrades
  Some workflows were using older versions of PHP and now they are upgraded. In the bc.yml and rector.yml files, the PHP version is updated from 8.0 to 8.1 and 8.3 respectively. Furthermore, composer-require-checker.yml and static.yml now support a wider range of versions, precisely from 8.0, 8.1, 8.2 to 8.0, 8.1, 8.2, and 8.3. These updates will allow our code to use features and improvements available in newer versions of PHP.