Admission fails silently when clicking "Rerun" on a PipelineRun in the PipelineRuns page,

[jvmdc]

While trying to reproduce #14548, I stumbled upon another bug - If the admission controller rejects the creation of the new PipelineRun when rerunning a pipeline from the PipelineRuns page, the user is not informed (although the error shows up in console)

To reproduce

1. Rerun a PipelineRun that will fail admission (e.g. by following the steps, with variation 2.a, in "Re-run" of a PipelineRun that used generateName with a long value fails. #14548)
2. Notice that no error is shown yet no PipelineRun starts.

Expectation

Error similar to the modal when using the "Start last run" functionality on the Pipelines page: