[Vue] Allow specifying vue component as inline help. #18786

Description:

Angularjs approach to using html in inline help was to have a selector to a node that is moved, but this won't work with Vue, since the node may not be fully rendered by the time its moved. So now it's possible to specify a component as the inline-help. Will be used in tag manager first.

Review

• [ ] Functional review done
• [ ] Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• [ ] Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• [ ] Security review done
• [ ] Wording review done
• [ ] Code review done
• [ ] Tests were added if useful/possible
• [ ] Reviewed for breaking changes
• [ ] Developer changelog updated if needed
• [ ] Documentation added if needed
• [ ] Existing documentation updated if needed