Remove roles

[lorenyu]

Ticket

n/a

Changes

• Remove user role and references to it
• Remove references to applicant or employer or superadmin

Context for reviewers

Cleaning up all the references to roles including the applicant and employer roles. Simple applications may only ever have one role so this is not needed.

⚠️ Migration notes

Cleaning out the roles from the migrations will be more complicated. I'll want to remove the migrations from the rails template and then recreate the schema.

Testing

Tested locally. Testing on preview environment:

homepage

create account page

sign in page

verify account page

mfa preferences page

landing page

Preview environment for app-rails

♻️ Environment destroyed ♻️

Preview environment for app

♻️ Environment destroyed ♻️

[MichaelCrawfordNava]

Just a couple of things:

1. L15 in new.html.erb seems to reference role (I'm assuming user role)
2. L16 in auth.md mentions user roles
3. Multiple of the CI checks seem to have failed, but upon looking it seems to be for reasons outside of this PR, so I'm assuming those should just be ignored for now?

[lorenyu]

@MichaelCrawfordNava CI checks were failing for a different reason that's been fixed on main, I pulled in changes from main which should fix most of those except the anchore-scan failure which I think we should ignore for now

[MichaelCrawfordNava]

LGTM!

[lorenyu]

Done in this commit navapbc/template-application-rails@5e2a120
(I accidentally pushed to main instead of making a PR)