[llvm-branch-commits] [DXIL][Analysis] Make the DXILResource binding optional. NFC (PR #100623)

[Justin Bogner via llvm-branch-commits]

https://github.com/bogner created https://github.com/llvm/llvm-project/pull/100623

This makes the binding structure in a DXILResource default to empty
and need a separate call to set up, and also moves the unique ID into
it since bindings are the only place where those are actually used.

This will put us in a better position when dealing with resource
handles in libraries.