Remove label annotations for genkit functions; they break

[inlined]

Ran into an error testing out onCallGenkit. Turns out that Run labels can only have [a-z0-9_-]. We need both capital letters and slashes. Run annotations supports that, but they are unavailable until after a migration to CRF.

[joehan]

Change seems fine to me, though I don't know the use case here. If it makes sense here, consider label encoding the genkit action name instead of omitting it entirely?

[joehan]

Also, add a changelog entry if appropriate

[inlined]

I'm not sure encoding is the best idea because the encoded value will be visible to the users through the Cloud console. I can chat with the genkit team and re-add if they want (since it would provide deployment metrics, though the pipeline would be torn down and rebuilt in CRF). In the meantime I'd like to just unblock the launch.

Not adding relnotes because it's a bugfix of an unreleased feature. LMK if you disagree and I'll add them

[joehan]

I'm not sure encoding is the best idea because the encoded value will be visible to the users through the Cloud console. I can chat with the genkit team and re-add if they want (since it would provide deployment metrics, though the pipeline would be torn down and rebuilt in CRF). In the meantime I'd like to just unblock the launch.

Not adding relnotes because it's a bugfix of an unreleased feature. LMK if you disagree and I'll add them

SGTM on both points