User regions in Python (#57)

* User regions in Python

* User-region testing + common submodule

- Updated examples/python/source.py to use user-regions
- Python-level user submodule
- Python-level common submodule
- clean-up of profiler python code
- extended source.py testing to include the user-regions

[ROCm/rocprofiler-systems commit: 4dd144a32c]

projects/rocprofiler-systems/tests/validate-timemory-json.py

@@ -25,9 +25,9 @@ def validate_json(data, labels, counts, depths):
         if _prefix != eitr[0]:
             raise RuntimeError(f"Mismatched prefix: {_prefix} vs. {eitr[0]}")
         if _count != eitr[1]:
-            raise RuntimeError(f"Mismatched count: {_count} vs. {eitr[1]}")
+            raise RuntimeError(f"Mismatched count for {_prefix}: {_count} vs. {eitr[1]}")
         if _depth != eitr[2]:
-            raise RuntimeError(f"Mismatched depth: {_depth} vs. {eitr[2]}")
+            raise RuntimeError(f"Mismatched depth for {_prefix}: {_depth} vs. {eitr[2]}")
 
 
 if __name__ == "__main__":