Extend fs_util deadline to 30 minutes (#6471)
Extend fs_util deadline to 30 minutes (#6471)

This deadline is really only in place because otherwise DNS failures
leave this hanging forever.

Make fs_util have a very long deadline (because it's not configurable,
like it is inside pants) until we switch to Tower (where we can more
carefully control specific components of timeouts).

See https://github.com/pantsbuild/pants/pull/6433 for more context.
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