Relativize all socket paths in tests.
Relativize all socket paths in tests.

Otherwise they may exceed the maximum.

PiperOrigin-RevId: 217584658
Change-Id: I869e400d3409599c0d3b85c6590702c052f49550

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor