Add webhookconfiguration options to tektonConfig additional options

[jkhelil]

Changes

Adds webhook configuration options(FailurePolicy, TimeoutSeconds, SideEffects) to tektonConfig additional options

Submitter Checklist

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• [x] Run make test lint before submitting a PR
• [x] Includes tests (if functionality changed/added)
• [x] Includes docs (if user facing)
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Release Notes

Adds webhook configuration options(FailurePolicy, TimeoutSeconds, SideEffects) to tektonConfig additional options