Description

As a user, I'd like to have the same support of code assistance in the Trigger modal that I can get in the Pipeline Builder.

Acceptance Criteria

1. For Parameter inputs, support Param code assistance (ODC-4277 is doing Pipeline Builder version of this)
   • `uid` is a global always available parameter
     • $(uid)
   • Support all the variables in the (Cluster)TriggerBinding (there is a variable section – see screenshot)
     • $(tt.params.<variableName>)
2. All changes are reflected in the TriggerTemplate resource that is created – nothing else should be impacted with this story

Additional Details:

See ODC-4277 for the foundation of Param code assistance.
TriggerTemplate Docs: https://github.com/tektoncd/triggers/blob/main/docs/triggertemplates.md#structure-of-a-triggertemplate