(chore): Fix the token expiry and move release version update code to a composite action.

[AjayJagan]

Description

Token expiry fix: The installation token generated through the GH app has a validity of 1 hour. ref: https://docs.github.com/en/apps/creating-github-apps/authenticating-with-a-github-app/generating-an-installation-access-token-for-a-github-app So the issue is, when waiting for e2e tests(github checks) which runs for more than 1 hr to finish, the token gets expired and then the gh action is no longer able to do other tasks(such as creating a pr) In order to fix this, we can use the GITHUB_TOKEN that is generated for each workflow. ref: https://docs.github.com/en/actions/security-guides/automatic-token-authentication#about-the-github_token-secret The GITHUB_TOKEN expires when a job finishes or after a maximum of 24 hours.

Move version update to composite action: There are 2 sets of steps in the job that does almost the same task. Instead of duplicating the steps, move it to a composite action and reuse the same.

JIRA: https://issues.redhat.com/browse/RHOAIENG-10059

How Has This Been Tested?

Both release actions were able to run successfully in my local:

1. https://github.com/AjayJagan/opendatahub-operator/actions/runs/9993405670
2. https://github.com/AjayJagan/opendatahub-operator/actions/runs/9993447302

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[Sara4994]

/lgtm

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Sara4994, VaishnaviHire

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