Rollup merge of #129754 - alexcrichton:fix-wasi-long-sleep, r=workingjubilee

wasi: Fix sleeping for `Duration::MAX`

This commit fixes an assert in the WASI-specific implementation of thread sleep to ensure that sleeping for a very large period of time blocks instead of panicking. This can come up when testing programs that sleep "forever", for example.

I'll note that I haven't included a test for this since it's sort of difficult to test. I've tested this locally though that long sleeps do indeed block and short sleeps still only sleep for a short amount of time.

Author: matthiaskrgr