Better Geo Node Form Error Messages

Problem

Currently when a Geo Node fails to save/update the error is generic:

However, the API does return error messages to hint to what went wrong:

Proposal

Update the catch https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/app/assets/javascripts/geo_node_form/store/actions.js#L46 to consume the error and present it to the user instead of the generic error message