create configmap and mount for the first workbench in NS

[harshad16]

create config map and mount for the first workbench in NS

Description

Fixes: https://issues.redhat.com/browse/RHOAIENG-5025

This PR fixes the issue linked above.
Currently, if the workbench is the first workbench in the namespace,
it fails to setup the config map: workbench-trusted-ca-bundle
This PR would create and mount the first workbench as well.

How Has This Been Tested?

Pre-requisite: https://access.redhat.com/documentation/en-us/red_hat_openshift_ai_cloud_service/1/html/installing_and_uninstalling_openshift_ai_cloud_service/working-with-certificates_certs

1. Deploy the PR
2. Create a DS project and start a workbench
3. Check for the configmap workbench-trusted-ca-bundle
4. Verify if the workbench is mounted with values.

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• [x ] The developer has manually tested the changes and verified that the changes work

[openshift-ci]

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[jstourac]

We don't want to utilize the notebook_controller.CreateNotebookCertConfigMap function for this?

[harshad16]

That func createdNotebookCertConfigMap has pointer to reconciler.
as we want to handle the admission, we didn't use that func.

please do share if you feel it can be used otherwise.

[harshad16]

@rkpattnaik780 @atheo89 can you please review this PR.

[atheo89]

Tested on my end and it works as expected
/lgtm

[harshad16]

thank you for testing and reviewing :)

[harshad16]

/cherry-pick stable

[openshift-cherrypick-robot]

@harshad16: new pull request created: #307

In response to this:

/cherry-pick stable

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