[Thinkit] Create factory reset test stub for ThinKit, Add CreateGnoiOsStub(), Added PutDirectory function to ThinKit SSH client, Rename structs holding mirror/generic fixture params to avoid nameclash, Add SaveSwitchLogs method to MirrorTestbedInterface, Allow thinkit tests to manually save logs, remove port_ids from MirrorTestbedFixture, make P4Info and IrP4Info configurable & Implement watch port test.

[Thinkit] Create factory reset test stub for ThinKit, Add CreateGnoiOsStub(), Added PutDirectory function to ThinKit SSH client, Rename structs holding mirror/generic fixture params to avoid nameclash, Add SaveSwitchLogs method to MirrorTestbedInterface, Allow thinkit tests to manually save logs, remove port_ids from MirrorTestbedFixture, make P4Info and IrP4Info configurable & Implement watch port test. #1966