Change Leader Election Config Map for Controllers and Webhook

[khrm]

Currently, it assumes default configmap config-leader-election which is also used by Tekton Pipelines controller. If someone changes pipelines controller configmap, it changes triggers also.

Fixes: #1623

Changes

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Release Notes

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[dibyom]

Do we need separate configs for controller and webhook?

[khrm]

@dibyom Yes. Otherwise, webhook also has the same number of leases as controllers.

[savitaashture]

/lgtm

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