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/include/hip_test_defgroups.hh

@@ -165,6 +165,7 @@ THE SOFTWARE.
  * @{
  * This section describes the tests for Stream Ordered Memory Allocator functions of HIP runtime
  * API.
+ * @}
  */
 
 /**