Updating the GHPages release process

[Gordonby]

PR Summary

Part 1 of the work in #215 to refactor the release process.

This work;

• splits the GHPages publish workflow to 2 workflow files that are separately triggered.
• removes the compiled ARM json from the repo
• stops storing the ARM json in the repo as part of the BicepBuild action

The next PR will focus on the release element, which unfortunately is hard to test until we create the workflow stub for that workflow action in main.

PR Checklist

• PR has a meaningful title
• Summarized changes
• This PR is ready to merge and is not Work in Progress
• Link to a filed issue

[khowling]

/release 0.5.10