KVM: UserConsentStatus Timeout Reporting

[amarnath-ac]

When user consent expires on the device, UserConsentStatus should change to Timeout, but it remains Requested. This task clarifies timeout trigger behavior and corrects status reporting.

Scope

1. Reproduce consent timeout flow in ACM mode.
2. Verify post-timeout OptInState from AMT/WSMAN.
3. Ensure mapping sets UserConsentStatus=Timeout for timeout state.
4. Validate returned GraphicalConsole values after timeout.

Acceptance Criteria

1. After consent expiry, Redfish returns UserConsentStatus: "Timeout".
2. KVMStatus and UserConsentStatus match actual AMT state after timeout.
3. Repro steps and expected timeout behavior are documented.