Workaround Devcom-1559808 in ranges::sort

[CaseyCarter]

If there's one thing that must work in C++, it's sorting vector =)

For ease of review: DevCom-1559808.

This also moves _Rewrap_subrange to <xutility> because it's already being used there:

STL/stl/inc/xutility

Line 5674 in ee5a216

return _Rewrap_subrange<subrange<_It1>>(_First1, _STD move(_UResult));

[AlexGuteniev]

Also occurs in:

STL/stl/inc/algorithm

Lines 2639 to 2643 in d8f03cf

	auto [_Match, _Mid1] =
	_Equal_rev_pred(_Candidate, _First2, _First2 + _Count2, _Pred, _Proj1, _Proj2);
	if (_Match) {
	return {_STD move(_Candidate), _STD move(_Mid1)};
	}

STL/stl/inc/xutility

Lines 5715 to 5720 in d8f03cf

	for (; _Count1 >= _Count2; ++_First1, (void) --_Count1) {
	auto [_Match, _Mid1] = _RANGES _Equal_rev_pred(_First1, _First2, _Last2, _Pred, _Proj1, _Proj2);
	if (_Match) {
	return {_STD move(_First1), _STD move(_Mid1)};
	}
	}

STL/stl/inc/ranges

Lines 3780 to 3784 in d8f03cf

	auto [_Begin, _End] = _RANGES search(subrange{_Current, _Last}, _Parent->_Pattern);
	if (_Begin != _Last && _RANGES empty(_Parent->_Pattern)) {
	++_Begin;
	++_End;
	}

STL/stl/inc/ranges

Lines 3826 to 3830 in d8f03cf

	auto [_Begin, _End] = _RANGES search(subrange{_It, _Last}, _Pattern);
	if (_Begin != _Last && _RANGES empty(_Pattern)) {
	++_Begin;
	++_End;
	}

[StephanTLavavej]

It looked like this was ready for review, so I went ahead and pushed minor changes. Please meow if you were still working on this! 🐱

[CaseyCarter]

Reviewer note: I just inadvertently pushed a commit into this branch, and then force-pushed it back to e88474f. Hopefully this didn't reset incremental review.

[StephanTLavavej]

I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed, or if more work is required.

[StephanTLavavej]

Thanks for fixing these bugs! 🔧 🐞 😻

[mnatsuhara]

Did a post-commit review and all looks good! (Just for the record 📝)