Ignore broken-pipe-no-ice on apple (specifically macOS) for now
This test fails for me locally (initially reported by Zalathar) because apparently on macOS it doesn't say "internal compiler error" but it does report the std I/O panic, and it doesn't exit with a code of 101 but instead terminates with a wait signal of SIGPIPE.
Ignore this test on apple for now, until we try to actually address the underlying issue.
See https://github.com/rust-lang/rust/pull/131155 and https://github.com/rust-lang/rust/issues/131436 for more context.
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