cp: implement sparse copy support for windows

[nikolalukovic]

Attempts to fix: #12186

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/date/resolution (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/misc/io-errors (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/tail/tail-n0f (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/cp/sparse-to-pipe is no longer failing!
Note: The gnu test tests/cut/bounded-memory is now being skipped but was previously passing.
Note: The gnu test tests/dd/no-allocate is now being skipped but was previously passing.
Note: The gnu test tests/expand/bounded-memory is now being skipped but was previously passing.

[nikolalukovic]

@oech3 Ready for review. Failing check is unrelated to these changes.

[sylvestre]

please add or enable relevant tests, thanks

[nikolalukovic]

please add or enable relevant tests, thanks

There are three new tests for this feature on windows, since this is windows specific PR. Is there anything else I could have done that I missed?

[nikolalukovic]

@sylvestre bump

[nikolalukovic]

@sylvestre bump

[Alonely0]

Barring a few issues, this looks like a great addition. However, I find myself wishing we could use a safe API of the windows-*/winapi_util crates, instead of raw win32 unsafe calls. If it's not available there, would you add safe wrappers of these to uucore::fs and use them here?

Also, can someone more familiar with Windows I/O take a second look? I can only comment on my limited experience here.