[doxygen] Exclude tools and TESTS directories. Add macro

Macro used to eliminate nested template which doxygen has a problem
with.

Author: sg-

doxygen_options.json

@@ -5,8 +5,8 @@
     "SEARCH_INCLUDES": "YES",
     "INCLUDE_PATH": "", 
     "INCLUDE_FILE_PATTERNS": "", 
-    "PREDEFINED": "DOXYGEN_ONLY \"MBED_DEPRECATED_SINCE(f, g)=\"",
+    "PREDEFINED": "DOXYGEN_ONLY \"MBED_DEPRECATED_SINCE(f, g)=\" \"MBED_ENABLE_IF_CALLBACK_COMPATIBLE(F, M)=\"",
     "EXPAND_AS_DEFINED": "", 
     "SKIP_FUNCTION_MACROS": "NO",
-    "EXCLUDE_PATTERNS": "*/targets/* */features/FEATURE_*/* */features/mbedtls/* */features/nanostack/* */features/storage/* */features/unsupported/* */features/frameworks/* */features/filesystem/fat/* */BUILD/* */rtos/* */events/* */cmsis/* */hal/* */features/*"
+    "EXCLUDE_PATTERNS": "*/tools/* */TESTS/* */targets/* */features/FEATURE_*/* */features/mbedtls/* */features/nanostack/* */features/storage/* */features/unsupported/* */features/frameworks/* */features/filesystem/fat/* */BUILD/* */rtos/* */events/* */cmsis/* */hal/* */features/*"
 }