DenseSet, SmallPtrSet, SmallSet, SetVector, and StringSet recently
gained C++23-style insert_range.  This patch replaces:

  Dest.insert(Src.begin(), Src.end());

with:

  Dest.insert_range(Src);

This patch does not touch custom begin like succ_begin for now.

Identified with misc-include-cleaner.

I'm going to touch this area in a subsequent patch.

- Add `MachineLoopAnalysis`.
- Add `MachineLoopPrinterPass`.
- Convert to `MachineLoopInfoWrapperPass` in legacy pass manager.

This patch is based on clang-tidy's modernize-make-unique but limited
to those cases where type names are mentioned twice like
std::unique_ptr<Type>(new Type()), which is a bit mouthful.

VPT blocks that do not produce an interesting 'output' (like a stored
value or reduction result), do not need to be predicated on vctp for the
whole loop to be tail-predicated. Just producing results for the valid
tail predication lanes should be enough.

The test case contains a vpt block with an else predicated instruction. This
might not be very unrealistic, but currently crashes due to not being able to
handle the else. The instruction would need to be removed. This patch adds some
extra checks that none of the instructions in vpt block is else predicated,
leaving it using vctp.