fix(auth): allow password managers to pre-fill input fields (#9390)

HTML disallows having multiple IDs with the same value.

In reality this is for 1Password's feature where you can create
custom fields named like input IDs and 1Password fill pre-fill that.

test/e2e-cypress/e2e/features/oauth2-flows/application.cy.js

@@ -30,11 +30,11 @@ describe("OAuth2 Application flow", function() {
       .click()
 
       .get("div.modal-ux-content > div:nth-child(2)").within(() => {
-        cy.get("#client_id")
+        cy.get("#client_id_application")
           .clear()
           .type("confidentialApplication")
 
-          .get("#client_secret")
+          .get("#client_secret_application")
           .clear()
           .type("topSecret")