[clang] [HLSL][SPIR-V] Add `-fspv-enable-maximal-reconvergence` flag to clang dxc. (PR #163474)

[Chris B via cfe-commits]

https://github.com/llvm-beanz commented:

LGTM, although I wonder if we should invert this. Since maximal reconvergence is effectively required for correct codegen for SPIRV maybe we should do this by default and have a flag to opt out.

https://github.com/llvm/llvm-project/pull/163474