Add component label to k8s-control-resources

[haskjold]

Description

Add component label to k8s-control-resources.

I would like to filter the resources in the generated manifests based on the component label and a bunch of them was missing this label. This PR together with PR 2667 and PR 2668 adds the missing labels.

Type of change

What type of changes does your code introduce to the kube-prometheus? Put an x in the box that apply.

• [ ] CHANGE (fix or feature that would cause existing functionality to not work as expected)
• [ ] FEATURE (non-breaking change which adds functionality)
• [ ] BUGFIX (non-breaking change which fixes an issue)
• [x] ENHANCEMENT (non-breaking change which improves existing functionality)
• [ ] NONE (if none of the other choices apply. Example, tooling, build system, CI, docs, etc.)

Changelog entry

Please put a one-line changelog entry below. Later this will be copied to the changelog file.

Add component label to k8s-control-resources.