CMake: correct test kernels naming + minor improvements

- For test kernels compiled with options passed, change their naming to
following convention:
{basename}_{options_passed}_{suffix}.
- Correct CMake variables naming.
- Refactor logic of retrieving test kernels' data (also in compilers
mock)
- In relation to previous changes: do not generate unnecessary
.gen binary for L0 test kernel

Related-To: NEO-7285
Signed-off-by: Kacper Nowak <kacper.nowak@intel.com>

shared/test/common/helpers/kernel_binary_helper.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018-2021 Intel Corporation
+ * Copyright (C) 2018-2022 Intel Corporation
  *
  * SPDX-License-Identifier: MIT
  *
@@ -22,6 +22,9 @@ KernelBinaryHelper::KernelBinaryHelper(const std::string &name, bool appendOptio
     retrieveBinaryKernelFilename(fclDebugVars.fileName, name + "_", ".bc");
     retrieveBinaryKernelFilename(igcDebugVars.fileName, name + "_", ".gen");
 
+    appendBinaryNameSuffix(fclDebugVars.fileNameSuffix);
+    appendBinaryNameSuffix(igcDebugVars.fileNameSuffix);
+
     fclDebugVars.appendOptionsToFileName = appendOptionsToFileName;
     igcDebugVars.appendOptionsToFileName = appendOptionsToFileName;