fix(configmaps): skip creating configmap for Alpha Configurations when used with OCP Proxy (backport #181)

[mergify]

What's changed

• Added a condition to only create alpha-config ConfigMap when openshift authentication is not enabled (i.e. with OAuth2-Proxy).
• Added common labels to the generated ConfigMap. Just good practice for easy querying :D

Motivations

I think it's a good to determine and create only necessary resources. This would be helpful in case the namespace has resource quota.

Related to #127

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This is an automatic backport of pull request #181 done by Mergify.

[mergify]

Cherry-pick of 208b142 has failed:

On branch mergify/bp/cryostat-v3.0/pr-181
Your branch is up to date with 'origin/cryostat-v3.0'.

You are currently cherry-picking commit 208b142.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   charts/cryostat/templates/alpha_config.yaml
	modified:   charts/cryostat/templates/deployment.yaml

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   charts/cryostat/tests/alpha_config_test.yaml

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally