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

[Steven Perron via cfe-commits]

s-perron wrote:

> 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.

I don't know how many drivers, particularly on Android, accept have the necessary extension. I'll have to double check, but I'm thinking we flip it when it is available in most places.


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