Cannot remove index from connector

[arisonl]

Unable to remove index (or pattern) through the Edit Connector UI. Expected behaviour: Ability to delete the selected index and replace it. If not possible, amend UI to make clear that this interaction is not available. This capture is from the Cloud.

[elasticmachine]

Pinging @elastic/kibana-alerting-services (Team:Alerting Services)

[arisonl]

Same happens on creation. Once you have selected the index, you cannot change it.

[mikecote]

Similar or duplicate of #63701 possibly.