[HLSL][clang-format] Disable CXXOperatorNames in HLSL mode

[bogner]

HLSL does not treat alternative operators as keywords (and, or, etc) - see #126758. We'll need to make sure we treat them as regular identifiers when formatting.

note: blocked on #126257

[llvmbot]

@llvm/issue-subscribers-clang-format

Author: Justin Bogner (bogner)

HLSL does not treat alternative operators as keywords (`and`, `or`, etc) - see #126758. We'll need to make sure we treat them as regular identifiers when formatting.

note: blocked on #126257