[llvm] [DirectX][ObjectYAML] Add SRCI part support (PR #199446)

[Shoaib Meenai via llvm-commits]

smeenai wrote:

The zlib tests added here are failing for me, e.g.

```
******************** TEST 'LLVM :: tools/obj2yaml/DXContainer/SRCIPart-multi-source-zlib.yaml' FAILED ********************
Exit Code: 2

Command Output (stdout):
--
# RUN: at line 1
$build/bin/yaml2obj $source/llvm/test/tools/obj2yaml/DXContainer/SRCIPart-multi-source-zlib.yaml | $build/bin/obj2yaml | $build/bin/FileCheck $source/llvm/test/tools/obj2yaml/DXContainer/SRCIPart-multi-source-zlib.yaml
# executed command: $build/bin/yaml2obj $source/llvm/test/tools/obj2yaml/DXContainer/SRCIPart-multi-source-zlib.yaml
# .---command stderr------------
# | LLVM ERROR: DXContainer SRCI Contents compressed size in header (90 bytes) doesn't match the actual compressed size (93 bytes)
```

Is it possible they're sensitive to e.g. the zlib version? Can we make them more general if so?

https://github.com/llvm/llvm-project/pull/199446