pti: move libpti.so driver to the custom $libdir/pti folder

With: https://github.com/intel/pti-gpu/commit/a928b93abb9b06d2b6e78c22bb6446c3437efb3f

Install the following dependencies:
```
$ docker run -it --rm ubuntu:26.04
# apt-get update && apt-get install git cmake make g++ gcc pkg-config python3 libze-dev
# apt-get install dpclang-6
```
Configure and install the project:
```
# cd sdk
# cmake -B _build -DCMAKE_C_COMPILER=dpclang -DCMAKE_CXX_COMPILER=dpclang++ \
-DCMAKE_INSTALL_PREFIX=/opt/_install .
# make -j16 -C _build/ install
```
The installation will look like the following:
```
# tree /opt/_install/
/opt/_install/
|-- include
| `-- pti
| |-- pti.h
| |-- pti_callback.h
| |-- pti_driver_levelzero_api_ids.h
| |-- pti_export.h
| |-- pti_metrics.h
| |-- pti_metrics_scope.h
| |-- pti_runtime_sycl_api_ids.h
| |-- pti_version.h
| `-- pti_view.h
|-- lib
| |-- cmake
| | `-- pti
| | |-- PtiConfig.cmake
| | |-- PtiConfigVersion.cmake
| | |-- PtiTargets-release.cmake
| | `-- PtiTargets.cmake
| |-- libpti.so
| |-- libpti_view.so -> libpti_view.so.0
| |-- libpti_view.so.0 -> libpti_view.so.0.17.0
| `-- libpti_view.so.0.17.0
`-- share
`-- doc
`-- pti
`-- LICENSE.txt

9 directories, 18 files
```

The `libpti.so` library is unversioned and as far as I know is kind of a driver/plugin for libpti_view.so which is an actual user entry point. As such:
1. `libpti.so` should not be installed to `$libdir` (at least by default) and instead placed into `$libdir/pti` instead
2. `libpti_view.so` must use hardcoded path to load the `libpti.so`, for example by doing `dlopen("./pti/libpti.so")`. This also can be handled in other ways such as adding `/etc/pti.conf` file which would hold PTI configuration such as driver location. Or hardcoding the location during build time configuration. However, I believe that using location relative to ``libpti_view.so`` should be a good starting point.

CC: @mschilling0 @frenchwr