Agentic Chat: Avoid starting an invalid workflow
What does this MR do and why?
Agentic Chat: Avoid starting an invalid workflow. Return the errors sent by backend instead
Related issue: https://gitlab.com/gitlab-org/gitlab/-/issues/577756+
Agentic Chat: Avoid starting an invalid workflow. Return the errors sent by backend instead
Related issue: https://gitlab.com/gitlab-org/gitlab/-/issues/577756+