[llvm] Reland: "[mlir][index][spirv] Add conversion for index to spirv" (PR #69790)

[Finn Plummer via llvm-commits]

inbelic wrote:

Was able to reproduce the error locally with the additional flag that you recommended @kuhar.
Adding `MLIRSPIRVDialect` and `MLIRSPIRVConversion` to the `MLIRIndexToSPIRV` deps, as well as, adding `MLIRIndexToSPIRV` to the `MLIRSCFToSPIRV` resolved the issue.

https://github.com/llvm/llvm-project/pull/69790