Helm chart SSO support (#17205)

* Add SAML support

* move extAuth below essential components

* Add CAS, PAM, LDAP support

* Add WEB_DOMAIN and S3_ALIAS_HOST support

* SAML defaults aligned

* Bump chart version

* SSO & WEB_DOMAIN support added

* Add OIDC support

* Correct typo

* Notice for OIDC support

Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>

chart/readme.md

@@ -24,9 +24,7 @@ The variables that _must_ be configured are:
 Currently this chart does _not_ support:
 
 - Hidden services
-- Single Sign-On
 - Swift
-- configurations using `WEB_DOMAIN`
 
 # Upgrading