build: prepare workflows for deletion of develop branch

[domire8]

Description

As we have done across almost all our stack, it would be nice to delete develop branch and work off main branch. For that, the workflows have to be updated. From now on, main will require linear history (right?).

The workflows follow these rules:

• We no longer set the version with each commit by default, only when we want to release a change
• Workflow would build and push rolling if there is no change in tag, else it builds and pushes rolling, latest, vX.Y.Z

Review guidelines

Estimated Time of Review: 10 minutes

Checklist before merging:

• Confirm that the relevant changelog(s) are up-to-date in case of any user-facing changes

[domire8]

@jjenscodee example of how you can compare versions with the new workflow

[jjenscodee]

thanks:+1:

[eeberhard]

Looks good to me, always hard to be sure but we can fix any problems in post if necessary :)