api/vmrule: populate validation error in VMRule status

[iceman2077]

Is your feature request related to a problem? Please describe

When a user creates a VMRule and it is not the correct one, the user does not see the error. I want the operator to write this error/status in the crd VMRule status in case of an error, and the user, when describing a resource, could see that there is an error there. Not all users have access to go and look at vmalert logs since this is a system component, and VMRule is just a user resourceю.

Describe the solution you'd like

I want the operator to write this error in the crd VMRule status in case of an error, and the user, when describing a resource, could see that there is an error there.

Describe alternatives you've considered

No response

Additional information

No response

[Haleygo]

Hello! You can enable validation admission webhook for VMRules, in this way, user will be refused immediately when trying apply invalid resource. And we will improve this validation in https://github.com/VictoriaMetrics/operator/issues/820. And since there is validation admission webhook, operator won't do duplicated check for vmrule spec, thus it can't write validation error back to vmrule.status.

And this issue is about operator, I will transfer it to the operator repo)