revert: "feat(IDP): use single callback endpoint"

This reverts commit e126ccc9aa.

# Which Problems Are Solved

#8295 introduced the possibility to handle idps on a single callback,
but broke current setups.

# How the Problems Are Solved

- Revert the change until a proper solution is found. Revert is needed
as docs were also changed.

# Additional Changes

None.

# Additional Context

- relates to #8295

console/src/app/modules/providers/provider-next/provider-next.service.ts

@@ -85,7 +85,7 @@ export class ProviderNextService {
       map((env) => [
         {
           label: 'ZITADEL Callback URL',
-          url: `${env.issuer}/idps/callback`,
+          url: `${env.issuer}/ui/login/login/externalidp/callback`,
         },
       ]),
     );

console/src/app/modules/providers/provider-saml-sp/provider-saml-sp.component.ts

@@ -84,7 +84,11 @@ export class ProviderSamlSpComponent {
               downloadable: true,
             },
             {
-              label: 'ZITADEL ACS',
+              label: 'ZITADEL ACS Login Form',
+              url: `${environment.issuer}/ui/login/login/externalidp/saml/acs`,
+            },
+            {
+              label: 'ZITADEL ACS Intent API',
               url: `${idpBase}/acs`,
             },
             {