syscall: return error if GetQueuedCompletionStatus truncates key
syscall: return error if GetQueuedCompletionStatus truncates key

This function has the wrong signature, so return an error when that
actually might lead to unexpected results. Users should switch to
x/sys/windows for the real version of this function.

Updates #44538.

Change-Id: I4d1f3d1e380815733ecfea683f939b1d25dcc32a
Reviewed-on: https://go-review.googlesource.com/c/go/+/296154
Trust: Jason A. Donenfeld <e7e312fea4c2c1aad2bb075d739111890e1ce08b@zx2c4.com>
Run-TryBot: Jason A. Donenfeld <e7e312fea4c2c1aad2bb075d739111890e1ce08b@zx2c4.com>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Bryan C. Mills <1c8aad60184261ccede67f5c63a0d2a3bf3c9ff4@google.com>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

nawawi/go,nawawi/go,CAFxX/go,CAFxX/go,golang/go,CAFxX/go,CAFxX/go,cloudflare/go,nawawi/go,cloudflare/go,cloudflare/go,golang/go,cloudflare/go,golang/go,cloudflare/go,CAFxX/go,cloudflare/go,CAFxX/go,golang/go,cloudflare/go,nawawi/go,golang/go,cloudflare/go,golang/go,golang/go,nawawi/go,nawawi/go,nawawi/go,CAFxX/go,CAFxX/go,nawawi/go,golang/go