Revert "feat: remove leader election for operator (#1000)"

we need leader election enabled for Operator This reverts commit 3610b0ba0cf19bb32853d9d513c2f42ff8ab9f2d.
cleanup manifests on configmap which is not used but still gets created by CSV from bundle

Description

How Has This Been Tested?

local build: quay.io/wenzhou/opendatahub-operator-catalog:v2.15.91 pod log:

I0805 13:12:45.727597       1 leaderelection.go:248] attempting to acquire leader lease openshift-operators/07ed84f7.opendatahub.io...
{"level":"info","ts":"2024-08-05T13:12:45Z","logger":"controller-runtime.certwatcher","msg":"Updated current TLS certificate"}
{"level":"info","ts":"2024-08-05T13:12:45Z","logger":"controller-runtime.webhook","msg":"Serving webhook server","host":"","port":9443}
{"level":"info","ts":"2024-08-05T13:12:45Z","logger":"controller-runtime.certwatcher","msg":"Starting certificate watcher"}
I0805 13:13:03.827022       1 leaderelection.go:258] successfully acquired lease openshift-operators/07ed84f7.opendatahub.io

Screenshot or short clip

Merge criteria

[ ] You have read the contributors guide.
[ ] Commit messages are meaningful - have a clear and concise summary and detailed explanation of what was changed and why.
[ ] Pull Request contains a description of the solution, a link to the JIRA issue, and to any dependent or related Pull Request.
[ ] Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
[ ] The developer has manually tested the changes and verified that the changes work

opendatahub-io / opendatahub-operator

Revert "feat: remove leader election for operator (#1000)" #1153

Description

How Has This Been Tested?

Screenshot or short clip

Merge criteria