fix(customresourcestate): generate unique HELP message for each family

[Duologic]

What this PR does / why we need it:

The family generator creates a family per GVK, this requires that the
configuration has a unique HELP text per custom metric. This is not
feasible when using wildcards as the generate will reuse the same HELP
text for each GVK it finds.

How does this change affect the cardinality of KSM: (increases, decreases or does not change cardinality)

It does not change cardinality but does change the HELP text on metrics generated by CustomResourceState.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #2384, fixes #2453

[k8s-ci-robot]

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[mrueg]

/assign @rexagod

[CatherineF-dev]

/lgtm

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This pull-request has been approved by: CatherineF-dev, Duologic
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