Add rich nav specific pipeline to enable Rich Navigation (#43374)
* Add new Rich Nav specific pipeline, temporarily enable RichNav in CI
* Temporarily fix template issue in arcade to test build
* Fix typo in build-job.yml
* Add Rich Nav package feed
* Thread 'enableRichCodeNavigation' parameter through, respond to PR feedback
* Remove change from templates
* Simplify templating and building after insight from Santiago
* Respond to pull request feedback from Santiago
* Specify environment manually, enable for allConfigurations
* Flow environment parameter through to build script
* HACK HACK HACK: replace normal CI with Rich Nav
* Increase timeout to 4 hours
* Empty commit to force another build
* Push empty commit to re-trigger build
* empty commit to force build
* fix build pipeline - remove script that no longer exists
* Add missing task
* Try changing the platform that is building this
* Update Rich Nav pipeline, revert changes to runtime pipeline