Description of problem:

Tektonconfig accepting non existing scc

Prerequisites (if any, like setup, operators/versions):

Install the latest build of Openshift Pipelines 1.12.0

Steps to Reproduce

• Run oc edit tektonconfig config
• Update spec.platforms.openshift.scc.default to some random string

Actual results:

The tektonconfig is not throwing any error

Expected results:

The tektonconfig should throw error

Reproducibility (Always/Intermittent/Only Once):

Always