OCPBUGS-35926: Add debounce to PAC auto selecton in git import flow

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Fixes:

https://issues.redhat.com/browse/OCPBUGS-35926

Analysis / Root cause:

Debounce was not called when checking for .tekton file in import flow

Solution Description:

Debounce the function call

Screen shots / Gifs for design review:

n/a

Unit test coverage report:

n/a

Test setup:

n/a

Browser conformance:

• [x] Chrome
• [x] Firefox
• [ ] Safari