Enable darwin-sandbox test cleanup and simplify ppid test
Enable darwin-sandbox test cleanup and simplify ppid test

Closes: #14509

Closes #14510.

PiperOrigin-RevId: 421836524

ButterflyNetwork/bazel,ButterflyNetwork/bazel,cushon/bazel,bazelbuild/bazel,bazelbuild/bazel,katre/bazel,katre/bazel,cushon/bazel,cushon/bazel,bazelbuild/bazel,katre/bazel,katre/bazel,ButterflyNetwork/bazel,cushon/bazel,katre/bazel,bazelbuild/bazel,bazelbuild/bazel,cushon/bazel,ButterflyNetwork/bazel,cushon/bazel,bazelbuild/bazel,katre/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel