Unnecessary API calls if TektonConfig is not minimal

Description of problem:
With OCPBUGS-11099 our Pipeline Plugin supports the TektonConfig config "embedded-status: minimal" option that will be the default in OpenShift Pipelines 1.11+.

But since this change, the Pipeline pages loads the TaskRuns for any Pipeline and PipelineRun rows. To decrease the risk of a performance issue we should make this call only if the status.tasks wasn't defined.

Version-Release number of selected component (if applicable):

• 4.12-4.14, as soon as OCPBUGS-11099 is backported.
• Tested with Pipelines operator 1.10.1

How reproducible:
Always

Steps to Reproduce:

1. Install Pipelines operator
2. Import a Git repository and enable the Pipeline option
3. Open the browser network inspector
4. Navigate to the Pipeline page

Actual results:
The list page load a list of TaskRuns for each Pipeline / PipelineRun also if the PipelineRun contains the related data already (status.tasks)

Expected results:
No unnecessary network calls. When the admin changes the TektonConfig config "embedded-status" option to minimal the UI should still work and load the TaskRuns as it does it today.

Additional info:
None