Implement Auth Page Redirects in preparation for Foundations page name changes

Background

groupfoundations is proposing a breaking change for %17.0 which involves changing existing URLs. You can see a full list of them on the issue.

Many of these are owned by ~"group::authentication and authorization" . The plan is to redirect the old URLs to the new URLs until %17.0 . This issue is to put the redirects into place.

Proposal

Redirect all of the URLs below:

User Settings

All the user settings pages use /profile as the root

Sidebar	Path	Addition	DRI	Design Priority
User settings ↳ Applications	/-/profile/applications	/-/user_settings/applications	@hsutor	Suggested
User settings ↳ Personal access tokens	/-/profile/personal_access_tokens	/-/user_settings/personal_access_tokens	@hsutor	Suggested
User settings ↳ Password	/-/profile/password/edit	/-/user_settings/password/edit	@hsutor	Suggested
User settings ↳ Active Sessions	/-/profile/active_sessions	/-/user_settings/active_sessions	@hsutor	Suggested
User settings ↳ Authentication Log	/-/profile/audit_log	/-/user_settings/authentication_log	@hsutor	Suggested