Limit users to a single active session per Tenant

[infinitetrooper]

Security-conscious enterprise customers want to limit their users to one active Appsmith session.

This will be a Business Edition feature where the customer will be able to set a tenant-level config to limit the sessions.

The below config in Admin Settings -> Authentication

User Session Limit [] Limit users to a single active session.

When a user tries to log in from a different browser, we should invalidate all active sessions of a user before logging in the user.