Removes vnc server from the vendor image

The vnc server resides in the host now. This change removes the binary
from the vendor image, adds the host binary to the
cvd_host_executables target and deletes the selinux configurations
necessary to run it guest side.

Bug: 65062047
Bug: 70945014
Test: run locally
Change-Id: I776151e286de5a77260d7bff70fa8251cdd39448
7 files changed