feat: add openshift serving certs to metrics endpoint, fixes RHOAIENG-1828

[dhirajsb]

Description

Add openshift serving certs to metrics endpoint
Fixes RHOAIENG-1828

How Has This Been Tested?

Locally applied the generated ODH config from the ODH overlay and verified the following:

• Cert secret name is correct in the service annotation
• Serving cert is created
• Cert secret name is correct in the auth proxy volume secretName
• Cert is loaded by operator in auth-proxy container

Verified metrics can be retrieved after creating clusterrolebinding from another pod serviceaccount to metrics-reader role.

Merge criteria:

• The commits and have meaningful messages; the author will squash them after approval or will ask to merge with squash.
• 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

[dhirajsb]

@tarilabs need to merge this before creating the next MR release for ODH 2.16

[tarilabs]

/lgtm

thanks Dhiraj

[tarilabs]

@dhirajsb you wanted me to perform the release train of MR by Monday, but seems this one is holding the release based on your #120 (comment).
Please advise.

[dhirajsb]

@tarilabs merged this change since I was waiting on a platform PR merge as well. We are ok to do the MR release now.