update gh workflow actions

[vdovhanych]

What is changed by this PR:

• Updates the various actions used for the projects workflows
• Changes the tj-actions/changed-files to better maintained action dorny/paths-filter usage is basically the same and from what i tested its working as expected.
  • This also allows a better granularity for the file filters with more options to conditionally run what is needed.

     - name: Get changed files
       id: changed-files
       uses: dorny/paths-filter@v3
       with:
         filters: |
           yaml-files:
             - 'config-example.yaml'
           go-files
             - '**/*.go'
           nix-files
             - '*.nix'

  and the you can use it with steps.changed-files.outputs.<filter-name> == 'true' to run it only if the files from that filter were changed.
• Small adjustments to file formatting

As next step i would like to introduce some naming conventions for the action files, workflow names and so on. But this is more upt to you guys if youd like that change.

• read the CONTRIBUTING guidelines
• raised a GitHub issue or discussed it on the projects chat beforehand
• added unit tests
• added integration tests
• updated documentation if needed
• updated CHANGELOG.md

[vdovhanych]

Hello @kradalby, could you take a look and trigger the runs to see if everything is fine?

[kradalby]

Sorry completely missed this, I will take a look later today or tomorrow

[kradalby]

As next step i would like to introduce some naming conventions for the action files, workflow names and so on. But this is more upt to you guys if youd like that change.

Happy to receive a proposal!