[hip-tests] Update API coverage report generator (#1932)

* [hip-tests] Update API coverage report generator

Updates the HIP API coverage tool. It now takes
extra arguments for the location of the catch test folder
and for the working directory. This avoids issues where the output
of the executable is dependent on the path where it is being
executed from.

Also updates CmakeLists.txt to integrate seamlessly with the
hip-tests project and avoid using commands which rely on
relative paths.

* Remove double new line

* Remove Cmake option to generate coverage

Removes Cmake option to generate coverage. Instead, explicitly removes
the gen_coverage target from all (this is already the default but
doing it explicitly prevents confusion).

projects/hip-tests/utils/coverage/hipAPIGroup.cpp

@@ -28,9 +28,9 @@ bool operator==(const HipAPIGroup& l_hip_api_group, const HipAPIGroup& r_hip_api
 
 HipAPIGroup::HipAPIGroup(std::string group_name, std::vector<HipAPI>& hip_apis)
     : group_name{group_name},
+      total_number_of_apis{0},
       number_of_api_calls{0},
       percentage_of_called_apis{0.f},
-      total_number_of_apis{0},
       number_of_test_cases{0} {
   std::vector<TestCaseOccurrence> test_cases;
   for (auto const& hip_api : hip_apis) {
@@ -85,7 +85,7 @@ int HipAPIGroup::getNumberOfDeprecatedAPIs() const { return deprecated_apis.size
 float HipAPIGroup::getPercentageOfCalledAPIs() const { return percentage_of_called_apis; }
 
 bool HipAPIGroup::isDeprecated() const {
-  return (deprecated_apis.size() == total_number_of_apis) ? true : false;
+  return (static_cast<int>(deprecated_apis.size()) == total_number_of_apis) ? true : false;
 }
 
 std::string HipAPIGroup::getBasicStatsXML() const {