Disable sem_test in regression suite
Disable sem_test in regression suite

This test is experiencing occasional flakes. Until we can determine
the cause, removing from regression suite to reduce noise.

PiperOrigin-RevId: 373176149
Change-Id: Idb3faf415e695b2e9d392ea8a4cce3daf518079d

google/asylo,google/asylo,google/asylo,google/asylo,google/asylo,google/asylo