Currently SameSite cookie None is not supported, see https://access.redhat.com/solutions/4385291
Provide support for it by backporting UNDERTOW-1600.
Enhance SameSite Cookie support
(7.2.z) [RH-SSO] UNDERTOW-1600 - Provide support for SameSite cookie None
(7.3.z) UNDERTOW-1702 - SameSiteCookieHandler can throw NPE if request doesn't contain user-agent header
(7.3.z) UNDERTOW-1685 - Slight test extension for SameSite cookie support
Update docs with EAP versions that support SameSite