Session key is not cleared when SAML Global Log Out API is called

### problem

Within the portal, SAML accounts operate normally without any issues until the logout process. Currently, a loop is generated during sign-out, and the web browser session is never properly terminated. As a result, users must either clear their browser cache or open a new session in incognito/private mode to log in again.

### versions

ACS. 4.22.x

### The steps to reproduce the bug

1. Enable Saml integration with Cloudstack

2. Login as saml user

Check the session key

2. Execute the following api

https://cloudstack.apache.org/api/apidocs-4.22/apis/samlSlo.html

https://your-mgmt-serverip:8080/client/api?command=samlSlo,

- If your IdP exposes its own Single Logout trigger, use that (it should redirect the browser to CloudStack's samlSlo URL).

Inspect the response in the Network tab
- Find the command=samlSlo request.
- Check its response headers: status 302, a Location header pointing at the redirect target — but no Set-Cookie header clearing JSESSIONID/userid/sessionkey (i.e. no Max-Age=0 entries for those names).

```
HTTP/1.1 302 Found
Content-Type: text/xml;charset=utf-8
Location: http://10.0.32.243:8080/simplesaml/saml2/idp/SingleLogoutService.php?SAMLRequest=nZGxasMwEIb3PoXRHluWVVsWsUMhFAJphybt0KUo8iUWsSXVkk0fv0rSQOjQocvBwd333S%2FNF199F00wOGV0hdIYowi0NI3Shwq9bh9nDC3qu7kTfUcsX5uDGf0LfI7gfLQMRWnhz6ut95YnSYpjHGckJjTjDDOcONXbDk77yRmSqMYmm4Dv4ELbwDApCbFtLYpWywp1%2BGgYxdBK24wEpqLtC%2BOnI3UuzzRWYcq5EVbaeaF9hQgm%2BQyzGWFbnHNacBxuyPN3FL1dc5FTrpBUO35JUqFx0NwIpxzXogfHveSbh6c1D6PcDsYbaTpUX4Lzs3C4JfwNEM7BcHoXVJvhEAsrZAux7MzYhKPlkRIyT27RV9FzQK2W%2FxJ9lHtW3BMpMaVUZGW5k2XTUCZ3ZZFmZJ9LSKnEaUrx1X2x1T%2Ftr%2B%2BtvwE%3D
Content-Length: 0
```

4. Login again

4. Logout saml user from the ui

Check the session key is not cleared

### What to do about it?

Session key should be cleared

Start by reviewing the linked merged pull request #14017, then reproduce the samlSlo API flow described in the issue and inspect the redirect response in the browser Network tab. Done means the logout response clears the listed session cookies and a subsequent login works without clearing browser data.

Written by the indexing model from the issue text.