Get gd os tests running on host

* Run os tests on host
* Fix flaky hander clear test
* Move to linux_generic
* Remove dependency on libchrome
* Allow alarms to run on linux host where we can't get CAP_WAKE_ALARM

Test: atest bluetooth_gd_test_os
Change-Id: Ia95ce39169ac8c963052e3252e7b39ef32bd5bb1