vts: skip data path reverb tests on offload effects

Skip the data path tests for offloading reverb, as offloading
effects don't publish fmqs and don't actually process the data.

Test: VtsHalEnvironmentalReverbTargetTest
Bug: 351751648

Change-Id: Ib5f37c4568d405c6c597eb27fe216e6e345a2eae