project: vm-x86_64-test-inc.mk: keep only Trusted HAL Test TAs

The test_vm primary purpose is to test the Trusty HALs.
The Trusty OS/services tests are moved to the vm-arm64-test_os*
targets.

Bug: 381899211
Test: lunch cf targets
Change-Id: Ia1ca09d0058f1665d1a02de3d33d9cc68998679a