UI: Allow userpass user to update their own password

[hashishaw]

Allows a userpass user to reset their own password, using the update password API.

New page, and link in user dropdown:

Page and dropdown if user does not have a userpass auth mount:

Error handling on page:

[github-actions]

Build Results:
All builds succeeded! ✅

[hellobontempo]

I know users navigate here from the dropdown, but would it be helpful to add a Cancel button that brings you back to the dashboard or auth method details?

[hashishaw]

I didn't add it because I wasn't sure where we would redirect the user back to. There are a few other forms like this that do not have a cancel button, and I figured they could get to wherever they wanted to be with the side nav.

[hellobontempo]

Thinking about reset password forms I've used - I'd expect an alert to render that it was successful above the form. It feels like we don't need to include a Reset form button + action to conditionally render the form.

But perhaps you had other reasons for doing so! Just a small comment about the UX here

[hellobontempo]

Looks like an extra @ here

Suggested change

	<EmptyState @title="No password reset access" @message={{@this.model.message}}>
	<EmptyState @title="No password reset access" @message={{this.model.message}}>

[hellobontempo]

Nice job! This is long overdue and I'm excited to finally have this functionality in the UI! 🎉 A couple of comments/questions, nothing major - except perhaps the minor template arg typo @this.type..