Remove unnecessary stuff from hip cmakefile

Remove the following from hip cmakefile,
1.find_package cmds of hsa-runtime64 and amd_comgr;
2.macros of USE_COMGR_LIBRARY and COMGR_DYN_DLL
because they have already been used in Rocclr cmakefile.
cmake mechanism will make hip cmakefile inherite them.

Change-Id: I03b527fc4135c79bb35cbbfe419211ec363cb067

hipamd/tests/hit/HIT.cmake

@@ -7,7 +7,7 @@ set(HIP_LIB_TYPE "shared")
 if (NOT ${BUILD_SHARED_LIBS})
     set(HIP_LIB_TYPE "static")
 endif()
-message(STATUS "HIP_LIB_TYPE - ${HIP_LIB_TYPE}")
+message(STATUS "HIP runtime lib type - ${HIP_LIB_TYPE}")
 #-------------------------------------------------------------------------------
 # Helper macro to parse BUILD instructions
 macro(PARSE_BUILD_COMMAND _target _sources _hipcc_options _hcc_options _clang_options _nvcc_options _link_options _exclude_platforms _exclude_runtime _exclude_compiler _exclude_lib_type _depends _dir)