Turn coverage collection for pybind11 extensions off by default

To turn it on, set `-DDPCTL_GENERATE_COVERAGE` and
`-DDPCTL_GENERATE_COVERAGE_FOR_PYBIND11_EXTENSIONS`

Author: oleksandr-pavlyk

CMakeLists.txt

@@ -17,6 +17,10 @@ option(DPCTL_GENERATE_COVERAGE
     "Build dpctl with coverage instrumentation"
     OFF
 )
+option(DPCTL_GENERATE_COVERAGE_FOR_PYBIND11_EXTENSIONS
+    "Build dpctl pybind11 offloading extensions with coverage instrumentation"
+    OFF
+)
 option(DPCTL_TARGET_CUDA
     "Build DPCTL to target CUDA devices"
     OFF

dpctl/tensor/CMakeLists.txt

@@ -217,9 +217,11 @@ foreach(python_module_name ${_py_trgts})
     )
     target_link_options(${python_module_name} PRIVATE ${_linker_options})
     if(DPCTL_GENERATE_COVERAGE)
-        target_compile_options(${python_module_name}
-            PRIVATE -fprofile-instr-generate -fcoverage-mapping
-        )
+        if(DPCTL_GENERATE_COVERAGE_FOR_PYBIND11_EXTENSIONS)
+            target_compile_options(${python_module_name}
+                PRIVATE -fprofile-instr-generate -fcoverage-mapping
+            )
+	endif()
         target_link_options(${python_module_name}
             PRIVATE -fprofile-instr-generate -fcoverage-mapping
         )

dpctl/utils/CMakeLists.txt

@@ -22,9 +22,11 @@ pybind11_add_module(${python_module_name} MODULE
 )
 add_sycl_to_target(TARGET ${python_module_name} SOURCES ${_module_src})
 if(DPCTL_GENERATE_COVERAGE)
-     target_compile_options(${python_module_name}
-         PRIVATE -fprofile-instr-generate -fcoverage-mapping
-     )
+     if(DPCTL_GENERATE_COVERAGE_FOR_PYBIND11_EXTENSIONS)
+         target_compile_options(${python_module_name}
+             PRIVATE -fprofile-instr-generate -fcoverage-mapping
+         )
+     endif()
      target_link_options(${python_module_name}
          PRIVATE -fprofile-instr-generate -fcoverage-mapping
      )