SWDEV-447358 - Add build_doc target to hip-tests

This change adds a new cmake target to generate test plan documentation using
Doxygen. The target is called build_docs and it's not added to the default
build commands, hence it needs to be called separately.

Signed-off-by: Sebastian Luzynski <Sebastian.Luzynski@amd.com>
Change-Id: I441524568e0513019ca21467950e48a551234802


[ROCm/hip-tests commit: 53406684ee]

projects/hip-tests/catch/DoxyfileTests

@@ -58,7 +58,7 @@ PROJECT_LOGO           =
 # entered, it will be relative to the location where doxygen was started. If
 # left blank the current directory will be used.
 
-OUTPUT_DIRECTORY       =
+OUTPUT_DIRECTORY       = @CMAKE_CURRENT_BINARY_DIR@
 
 # If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub-
 # directories (in 2 levels) under the output directory of each output format and
@@ -829,7 +829,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  =
+INPUT                  = @CMAKE_CURRENT_SOURCE_DIR@
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses