feat(auth): enhance SSO handling and workspace auth logic (#9858)

- Return only SSO providers with an `activate` status
- If only 1 SSO provider is enabled for auth, redirect the user to the
provider login page.
- if only SSO auth is available set the step to SSO selection.

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-front/src/modules/auth/hooks/__tests__/useAuth.test.tsx

@@ -124,13 +124,7 @@ describe('useAuth', () => {
     const { state } = result.current;
 
     expect(state.icons).toEqual({});
-    expect(state.workspaceAuthProviders).toEqual({
-      google: true,
-      microsoft: false,
-      magicLink: false,
-      password: true,
-      sso: [],
-    });
+    expect(state.workspaceAuthProviders).toEqual(null);
     expect(state.billing).toBeNull();
     expect(state.isDeveloperDefaultSignInPrefilled).toBe(false);
     expect(state.supportChat).toEqual({