[main] turn on INSTALL_TEST (#86)

Fixes https://ontrack-internal.amd.com/browse/SWDEV-541260

Turns on
https://github.com/ROCm/builder/blob/main/manywheel/build_rocm.sh#L16 to
install binarys needed for certain test suites that are generated during
the build but not usually included in the runtime wheels. Adds about 1MB
to the wheel size

```
ethanwee@ubb4-rack-22:~$ unzip -l torch-2.7.1+rocm7.0.0.git4d586cdc-cp310-cp310-linux_x86_64.whl | grep libtorchbind_test.so
   995704  2025-07-07 21:41   torch/lib/libtorchbind_test.so
```

---------

Co-authored-by: Jithun Nair <[email protected]>

Author: ethanwee1

manywheel/build_rocm.sh

@@ -13,7 +13,7 @@ export USE_STATIC_CUDNN=1
 export USE_STATIC_NCCL=1
 export ATEN_STATIC_CUDA=1
 export USE_CUDA_STATIC_LINK=1
-export INSTALL_TEST=0 # dont install test binaries into site-packages
+export INSTALL_TEST=1 # install test binaries into site-packages
 # Set RPATH instead of RUNPATH when using patchelf to avoid LD_LIBRARY_PATH override
 export FORCE_RPATH="--force-rpath"