Enhance Github Actions

[jgebal]

In order to completely move from Travis-CI to github actions, following list of steps needs to be done.

• move bash files from .travis to .github/scripts
• add release action on tagging (based on contents of travis.yml file
• test release process (add missing secrets)
• remove travis.yml file
• add publish to Sonar
• add publish test results (from matrix)

Part of wok is performed already as part of #102

[simasch]

Done