Onboard Tekton Scheduler to operator

[pramodbindal]

Changes

Onboarding Tekton Scheduler to operator.

Tekton Scheduler enables the pipeline scheduling on Single or multi cluster environment. But default this feature remains disabled.

This feature is dependent on upstream Kueue so that must be installed first before scheduler can be enabled. It also uses cert-manager so that also must be installed before head.

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[pramodbindal]

/retest

[savitaashture]

@pramodbindal Please add the description for the change

• Reason for this change
• How this PR helps in single and multicluster env
• and upgrade test screenshot
• Is this works for both K8s and other distributions

Thank you

[savitaashture]

@pramodbindal can we also add a document on what pre-requisite required for the scheduler to be enabled