Merge pull request #24007 from mikedn/enable-w4

Compile JIT sources with /W4

diff --cc src/jit/CMakeLists.txt
Simple merge

diff --cc src/jit/compiler.h
Simple merge

diff --cc src/jit/gentree.cpp
Simple merge

diff --cc src/jit/hwintrinsiccodegenxarch.cpp
Simple merge

diff --cc src/jit/hwintrinsicxarch.cpp
Simple merge