[CIR][CUDA] Add attribute for CUDA fat binary name

[AdUhTkJm]

This is a preparation of generating registration functions in LoweringPrepare.

CUDA compilation works as follows (irrelevant arguments omitted):

# First compile for device, generating PTX assembly
clang++ test.cu -fcuda-is-device -o device.s

# Convert that into a binary file
ptxas device.s --output-file device.o
fatbin --create device.fatbin --image=profile=sm_52,file=device.o

# Pass that file as an argument to host
clang++ test.cu -fcuda-include-gpubinary device.fatbin -cuid="some unique id"

And from the name of GPU binary, we can obtain a handle for registration. So we add an attribute to ModuleOp, recording that name.

If that -fcuda-include-gpubinary is not specified (like in the test simple.cu), OG will not generate any registration function. We do the same here by not generating the attribute.

[github-actions]

✅ With the latest revision this PR passed the C/C++ code formatter.

[bcardosolopes]

LGTM after fixing minor nits