Release 0.3.1 Step 2: Create or Rebase Release Branches

Description

For all EdgeOps repos, rebase the 0.3.1 branch with HEAD from main in order to ensure that all changes exist in the release branch. If no [0.3.1] branch exists for that repo, create one from HEAD of main instead.

Acceptance Criteria:

• 0.3.1 branch exists and has all updates from main on all repos:
  • proxmox-provider
  • edge-operator
  • iso-builder
  • edge-controller
  • edge-orchestrator
  • crossplane-provider