ci: Run workflows against 5.x.x branches

[DannyvdSluijs]

Description

This PR will run the workflows (excluding phpstan) on the 5.x.x branch

Related Issue

#841
#857

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code refactoring
• Other (please describe):

Checklist

• I have read the CONTRIBUTING guidelines
• My code follows the code style of this project
• I have added tests that prove my fix is effective or that my feature works
• All new and existing tests pass
• I have updated the documentation accordingly
• My changes generate no new warnings

Additional Notes

This should allow the run of workflows for #857 and future PR's against the 5.x.x branch