Make ResponseOps owned connectors flag user errors

[mikecote]

Blocked on: https://github.com/elastic/kibana/issues/180957

We need to go through each connector type executor and make them report user errors accordingly. We must follow the guidelines from https://github.com/elastic/kibana/issues/180957 to properly flag user type errors.

Connector Types:

• [ ] Email
• [ ] Index
• [ ] PagerDuty
• [ ] Swimlane
• [ ] Server log
• [ ] Slack
• [ ] Slack API
• [ ] Webhook
• [ ] Webhook - Case Management
• [ ] xMatters
• [ ] ServiceNow ITSM
• [ ] ServiceNow ITOM
• [ ] Jira
• [ ] IBM Resilient
• [ ] Microsoft Teams
• [ ] Opsgenie
• [ ] Cases

Definition of Done

• [ ] All connector types in the list above are flagging user errors according to the guidelines
• [ ] Testing is in place to ensure user errors are reported to the framework properly

cc @kobelb @heespi

[elasticmachine]

Pinging @elastic/response-ops (Team:ResponseOps)

[cnasikas]

I am unsure if possible but what do you think of adding this functionality to the sub-actions framework? All connectors that use the sub-actions framework can take it for free without us needing to do the same work for all connectors.