Poll for job status even for non-PR usecases (#82)

It is important also for non-PR jobs to see progress of TF in executing
the testing job so that the INFRA state can be parsed from TF's output
and job result can be set as final result of the GitHub Action job.

action.yml

@@ -237,7 +237,6 @@ runs:
 
     - name: Check if scheduled test is still running
       id: still_running
-      if: ${{ inputs.update_pull_request_status == 'true' }}
       run: |
         CMD=${{ inputs.api_url }}/requests/${{ steps.sched_test.outputs.req_id }}
         curl $CMD > job.json
@@ -259,7 +258,6 @@ runs:
 
     - name: Get final state of Testing Farm scheduled request
       id: final_state
-      if: ${{ inputs.update_pull_request_status == 'true' }}
       run: |
         curl ${{ inputs.api_url }}/requests/${{ steps.sched_test.outputs.req_id }} > job.json
         if [ "${{ inputs.debug }}" == "true" ]; then