chore(project): reorganize circle tasks with new dependencies

[jaredlockhart]

Because

• We now have many new CircleCI integration tests and tasks for updating each of the external dependencies on: Firefox Desktop, Firefox Android (Fenix), Firefox iOS, and Application Services
• This allows us to be more specific about which tests should run when each of those updates
• This should reduce the overall amount of integration tests we run on PRs in general since only the specific tests necessary for a given PR should be run
• This should bring down CircleCI costs and PR times

This commit

• Adds additional path filtering to each integration test
• Renames CircleCI tasks to be more consistent

Fixes #11829