[clang] [CIR][CUDA] Read fat binary in CIRGen and store its bytes on the module (PR #225971)

[David Rivera via cfe-commits]

RiverDave wrote:

Running polybench on this branch:

| Metric | CIR | OG |
|---|---:|---:|
| Compiled | 21/21 | 21/21 |
| Ran OK | 21/21 | 21/21 |
| GPU geomean (s) | 1.0004 | 0.9990 |
| Size mean (KiB) | 35.7 | 35.5 |

https://github.com/llvm/llvm-project/pull/225971