Add a bashunit test for tests using bash errexit.
Add a bashunit test for tests using bash errexit.

PiperOrigin-RevId: 401304798

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