Skip DisableCollection JDWP tests for userfaultfd GC

The test is failing intermittently when run with userfaultfd GC. Temporarily
skip until the GC's implementation is completed.

Test: ART_USE_READ_BARRIER=false art/tools/run-libjdwp-tests.sh --host
Bug: 242181443
Change-Id: I4f0f9b054ff85b3a2ccbab95809ca34c395aee4f
(cherry picked from commit 3f4effc7bb026455df0894f119e541d93304c8a6)
Merged-In: I4f0f9b054ff85b3a2ccbab95809ca34c395aee4f