Add rich nav specific pipeline to enable Rich Navigation (#43374)

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