seq: add SIGPIPE handling for GNU compatibility

[ChrisDryden]

This is a culmination of the work done by @mattsu2020 and @Ecordonnier to address the issues with SIGPIPE handling.

The high level issue is that Rust by default overrides the handling of SIGPIPE and ignores it, and theres a bunch of functionality that relies on this in the GNU Coreutils. @mattsu2020 was able to identify a really ingenious approach where he was able to do:

        #[cfg(all(unix, not(target_os = "macos")))]
        #[used]
        #[unsafe(link_section = ".init_array")]
        static CAPTURE_SIGPIPE_STATE: unsafe extern "C" fn() =

and it is able to hook into a process that runs before the function is started that is able to set the value of an atomic to the state of the SIGPIPE signal and whether the ignore SIGPIPE signal was set.

I took this implementation here: #9184 and turned it into a macro that you can add to the utility that you need to use these flags for and it gives you the ability to set both the enable_pipe_errors and check the state of sigpipe_was_ignored inside your function to return different error codes depending on the error.

I also then went through every single signal related GNU test and tried this approach to see if it would fix the issues and it appears that this approach is able to address every GNU related signal test: #9646

[ChrisDryden]

An approach we can do if we decide that we want this for every since function that inits the sigpipe capture is that we can add this logic to the signals handler itself?

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/tail/overlay-headers (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/seq/seq-epipe is no longer failing!

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/seq/seq-epipe is no longer failing!

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/tail/overlay-headers (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/seq/seq-epipe is no longer failing!

[ChrisDryden]

The tests that appear to be failing appear to be flaky tests, should be good for review now. This one is required for the next PR which is the env flags for ignoring signals

[ChrisDryden]

@sylvestre Would it be better if I made this into a bigger PR where I combine use the uucore::init_sigpipe_capture and signals::sigpipe_was_ignored to address all of the issues related to sigpipe in the queue to show it has full GNU compatibility

[ChrisDryden]

Once this is in, I will follow up with an attempt to bring this to the bin handler so that its applied to all utilities. Ideally we don't need to add this for every utility

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)
Congrats! The gnu test tests/seq/seq-epipe is no longer failing!

[ChrisDryden]

I am very excited that this is in, we are going to be able to fix so many outstanding issues now using this now