Fixed copy semantics of objects #7371

Job	Run time
Build LPython to WASM	5m 45s
LPython CI (3.10, ubuntu-latest)	8m 52s
Check Debug build	2m 26s
LPython CI (3.10, macos-latest)	9m 15s
Run Integration tests with Python 3.9	1m 40s
Test CPython Interop (@pythoncall)	1m 37s
LPython CI (3.10, windows-2019)	14m 10s
Run Integration tests with Python 3.10	1m 50s
Check Release build	3m 36s
Run Integration tests with Python 3.11	1m 36s
Run Integration tests with Python 3.12	1m 35s
Test PIP Installable Packages	1m 15s
Run SymPy tests	2m 3s
Build Jupyter Kernel	3m 36s
Upload Tarball	1m 5s
	1h 0m 21s

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