DEV-46689 - Change datasources API permissions to Admin Only

[yasmin-tr]

What is this feature?

Since grafana 8.5 the permission system changed (RBAC was enabled) and the datasources read APIs were changed to be from admin only to be available to other users. We want to maintain the access to datasources for admin only in these APIs. We will expose another API with only relevant datasource data we want available.

Why do we need this feature?

[Add a description of the problem the feature is trying to solve.]

Who is this feature for?

[Add information on what kind of user the feature is for.]

Which issue(s) does this PR fix?:

Fixes #

Special notes for your reviewer:

Please check that:

• It works as expected from a user's perspective.
• If this is a pre-GA feature, it is behind a feature toggle.
• The docs are updated, and if this is a notable improvement, it's added to our What's New doc.

[yasmin-tr]

run-test

[github-actions]

This pull request has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 2 weeks if no further activity occurs. Please feel free to give a status update or ping for review. Thank you for your contributions!

[github-actions]

This pull request has been automatically closed because it has not had any further activity in the last 2 weeks. Thank you for your contributions!