user: update User CM to use destinations

[tony-tvu]

• Identified the issue which this PR solves.
• Read the CONTRIBUTING document.
• Code builds clean without any errors or warnings.
• Added appropriate tests for any new functionality.
• All new and existing tests passed.
• Added comments in the code, where necessary.
• Ran make check to catch common errors. Fixed any that came up.

Description:
This PR updates the UserContactMethod form, create, and edit dialogs to use destinations when the experimental flag is set make start EXPERIMENTAL=dest-types.

Which issue(s) this PR fixes:
part of #2639

Out of Scope:

• moved destinationTypes to RequireConfig provider

Screenshots:

Describe any introduced user-facing changes:
N/A, behavior should be the same as today, with the exception of Slack now using the team/workspace icon instead of the generic slack icon.

Describe any introduced API changes:

• adds supportsStatusUpdates and statusUpdatesRequired to DestinationTypeInfo
• add dest to UserContactMethod for destination info

Additional Info:
n/a