Created attachment 1750725 [details]
fix rerun pipeline run when embedded pipelineSpec present

Description of problem:
While re-running the pipelineRun with embedded pipelinespec causes the UI to crash.

Prerequisites (if any, like setup, operators/versions):
Openshift Pipeline Operator 1.2

Steps to Reproduce:
1. create a pipeline with embedded pipelineSpec

apiVersion: tekton.dev/v1beta1
kind: PipelineRun
metadata:
  name: pipelinerun-with-taskspec-to-echo-good-morning
spec:
  pipelineSpec:
    tasks:
      - name: echo-good-morning
        taskSpec:
          metadata:
            labels:
              app: "example"
          steps:
            - name: echo
              image: ubuntu
              script: |
                #!/usr/bin/env bash
                echo "Good Morning!"

Actual results:
rerun action throws an error in the browser console

Expected results:
re-run action should not result in unhandled error and it should re run the pipelinerun successfully.

Reproducibility (Always/Intermittent/Only Once):
Always

Build Details:
4.7.0-0.nightly-2021-01-22-134922