Add functionality to update password with password hash (#15343)

* Add functionality to update password with password hash

This can be used to update a user's password with a direct password
hash instead of providing the password in plaintext.

* Use test helper for local mode

api4/user_local.go

@@ -25,6 +25,7 @@ func (api *API) InitUserLocal() {
 	api.BaseRoutes.User.Handle("/roles", api.ApiLocal(updateUserRoles)).Methods("PUT")
 	api.BaseRoutes.User.Handle("/mfa", api.ApiLocal(updateUserMfa)).Methods("PUT")
 	api.BaseRoutes.User.Handle("/active", api.ApiLocal(updateUserActive)).Methods("PUT")
+	api.BaseRoutes.User.Handle("/password", api.ApiLocal(updatePassword)).Methods("PUT")
 	api.BaseRoutes.User.Handle("/convert_to_bot", api.ApiLocal(convertUserToBot)).Methods("POST")
 	api.BaseRoutes.User.Handle("/email/verify/member", api.ApiLocal(verifyUserEmailWithoutToken)).Methods("POST")