Updating CI/CD to check for protected branch and use token so workflow re-runs (release/21.0.x branch)

[bradlhart]

Change Description

When merging with protected branches, the yarn.lock updates will fail to push. This will check if the branch is protected and avoid pushing and failing.

Additionally, the workflow needs to re-run and succeed in order to easily merge. However, the github.token supplied to GitHub Actions will not re-run a workflow if it fires the event to avoid infinite runs of the workflow. Adding and using a different token will allow the workflow to re-run. Infinite runs is not an issue for this workflow since it only runs again if there are any updates to the dependencies.

Since forks wouldn't have the token set in their repo secrets but all repos have github.token set inside workflows, it was also important to create a conditional that allows the workflow to checkout with either token so workflows ran in forks won't fail without the token in the repo secrets.

Second PR to cherry pick commits to release/21.0.x branch

API Changes

• API Changes

Documentation Additions

• Documentation Additions