fix: stale user and data issue on SSO logout

[emrberk]

These co-existed in Web Console:

• Web Console only changes the view from Ready to Login, to show the login screen
• When a user logs in via SSO and logs out afterwards, Web Console keeps the client id to provide Continue as ... option, to perform single-click login.
• Web Console was automatically running Oauth flow on app start, if it finds a client id, but not a token.

As a result, whether the user has logged out or not, page refreshes were resulting in auto-login. This PR:

• Adds an explicit flag SSO_SESSION_ACTIVE that is set to false when the user logs out, to prevent auto-login of a user on page refresh.
• Adds auto-refresh for the page on logout to clear stale information from previous user's session (e.g. grid results), not to leak into the next login.
• Adds --cached flag to enterprise test script not to clone and build the codebase in every run.
• Requires Java 25 in the test script, and auto-finds the JDK if it can.