Add logging for admin groups manipulation within dashboard config instance

[mlassak]

Resolves: #463

Description

Adds logging for the mentioned cases of changing the odh-dashboard-config CRD instance.

How Has This Been Tested?

Tested locally through modifying the odh-dashboard-config CRD instance on the cluster and checking responses from config GET calls on the backend.

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).
• The developer has manually tested the changes and verified that the changes work

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[andrewballantyne]

I should let @lucferbux lead this one... not sure what he was thinking.

/assign @lucferbux

[andrewballantyne]

@lucferbux this will log a lot -- any ideas a better way to approach this? Maybe we do this as part of startup?

We can't do it on set... so did you have another thought?

[openshift-merge-robot]

@mlassak: PR needs rebase.

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[lucferbux]

Closing this PR, we might wanna explore other alternatives.