Restructure code object source code (#826)

* public codeobj info

* Restructure code object source code file layout

* Update get_unloaded_code_objects + add iterate_loaded_code_objects

* Remove get_unloaded_code_objects from visible internal API

- iterate_loaded_code_objects + functor which filters on the hsa_executable_t effectively reproduces this behavior

* Whitespace removal

---------

Co-authored-by: Jonathan R. Madsen <jonathanrmadsen@gmail.com>

source/lib/rocprofiler-sdk/code_object/CMakeLists.txt

@@ -0,0 +1,11 @@
+#
+# code object
+#
+set(ROCPROFILER_LIB_CODE_OBJECT_SOURCES code_object.cpp)
+set(ROCPROFILER_LIB_CODE_OBJECT_HEADERS code_object.hpp)
+
+target_sources(rocprofiler-object-library PRIVATE ${ROCPROFILER_LIB_CODE_OBJECT_SOURCES}
+                                                  ${ROCPROFILER_LIB_CODE_OBJECT_HEADERS})
+
+add_subdirectory(hsa)
+add_subdirectory(hip)