Goal
TaskRun and PipelineRun should be excluded from ArgoCD by default

Problem

ArgoCD prunes TaskRun and PipelineRun objects if pipeline is manged by it. To avoid the pruning, an exclusion rule needs to be added explicitly. An example below. The exclusion should happen by default.

  resourceExclusions: |
    - apiGroups:
      - tekton.dev
      clusters:
      - '*'
      kinds:
      - TaskRun
      - PipelineRun 

Why is it needed?

ArgoCD prunes any PipelineRun object if it manages the Pipeline and it requires exclusion rules in ArgoCD to avoid that. They should be excluded by default.

Acceptance Criteria

1. Add resourceExclusions rule for Tekton PipelineRun and TaskRun by default for all argoCD instances.