Move release pipeline from Norskhelsenett gitlab to github

[havardelnan]

The current build steps now includes a manual step with possibility of errors. We need to move the build process to github actions to keep this automated.

Proposal:

• Move the current build process to github actions
• Consider migrating to cloud native buildpacks from kaniko to eliminate the build step for go code.
• Build on release not commit.
  • any semver-release is pushed as stable aka latest
  • any -rc.x release is pushed as develop
  • helm charts are pushed to oci on build for both and can be tracked by using wildcard semver matches eg 0.* 0.*-0

todo

• agent v1 to https://github.com/NorskHelsenett/ror-agent
• agent v2 to https://github.com/NorskHelsenett/ror-agent
• api to https://github.com/NorskHelsenett/ror-api
• ms-audit to https://github.com/NorskHelsenett/ror-ms-audit
• ms-auth to https://github.com/NorskHelsenett/ror-ms-auth
• ms-kind to https://github.com/NorskHelsenett/ror-ms-kind
• operator to https://github.com/NorskHelsenett/ror-operator
• ms-slack to https://github.com/NorskHelsenett/ror-ms-slack
• ms-switchboard to https://github.com/NorskHelsenett/ror-ms-switchboard
• ms-vulnerability to https://github.com/NorskHelsenett/ror-ms-vulnerability