Expanded description of DPCTL_OFFLOAD_COMPRESS option

```
$ cmake . -LAH -DCMAKE_C_COMPILER=icx -DCMAKE_CXX_COMPILER=icpx | grep -a2 DPCTL_OFFLOAD_COMPRESS

// Build using offload section compression feature of DPC++ to reduce size of shared object with offloading sections
DPCTL_OFFLOAD_COMPRESS:BOOL=OFF

// Build DPCTL to target CUDA devices
```

Author: oleksandr-pavlyk

CMakeLists.txt

@@ -34,8 +34,16 @@ set(DPCTL_TARGET_HIP
     CACHE STRING
     "Build DPCTL to target a HIP device architecture"
 )
-option(DPCTL_WITH_REDIST "Build DPCTL assuming DPC++ redistributable is installed into Python prefix" OFF)
-option(DPCTL_OFFLOAD_COMPRESS "Build using offload section compression feature of DPC++" OFF)
+option(
+     DPCTL_WITH_REDIST
+     "Build DPCTL assuming DPC++ redistributable is installed into Python prefix"
+     OFF)
+option(
+     DPCTL_OFFLOAD_COMPRESS
+     "Build using offload section compression feature of DPC++ to reduce \
+size of shared object with offloading sections"
+     OFF
+)
 
 find_package(IntelSYCL REQUIRED PATHS ${CMAKE_SOURCE_DIR}/cmake NO_DEFAULT_PATH)