docs: Add responsibles label to ocmcli component descriptor

[8R0WNI3]

What this PR does / why we need it

The responsibles label is used to automatically assign detected compliance issues to the responsible GitHub team. If no such responsibles are configured, GitHub repository statistics will be heuristically examined to determine the respective responsibles, however, these statistics are not properly created for this repository.

Which issue(s) this PR fixes

[github-actions]

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Repository: open-component-model/ocm

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[jakobmoellerdev]

Since this label is opinionated, I am not sure if we should really accept this. if at all it should be ocm.software/responsibles. WDYT?

[morri-son]

seems to be related to naming conventions discussions for "standard" labels that we expect to be used with OCM we had in the past, but never productively continued / finished :-)

The OCM spec differentiates between labels with a specific meaning inside of OCM and others, vendor specific ones (see here. cloud.gardener.cnudie/responsible would fall in "vendor-specific", but is very "standard" as many teams will have a need for them.

Therefore I support Jacob's proposal and start having a set of "standard" labels in the ocm.software namespace that we offer and use in our examples and OCM owned components.

[ccwienk]

I agree it will likely be a good idea to have a registry of "wellknown" labels (I started an internal one here). I also agree we should eventually drop cnudie.

Considering, however, that we might see similar cases in the future, how about adding an aliases-attr to labels? Also, I would very much appreciate it so see a registry of well-known labels at this github-organisation (those might be a good fit as additional language-bindings - ours (note that the package(-name) did not age well / is subject to being refactored).