Fixed copy semantics of objects #7369

Job	Run time
LPython CI (3.10, ubuntu-latest)	3m 32s
Test CPython Interop (@pythoncall)	3m 34s
LPython CI (3.10, macos-latest)	3m 32s
Build LPython to WASM	3m 30s
LPython CI (3.10, windows-2019)	3m 17s
Build Jupyter Kernel	3m 29s
Check Debug build	3m 23s
Run Integration tests with Python 3.9	3m 30s
Run Integration tests with Python 3.10	3m 31s
Check Release build	3m 30s
Run SymPy tests	3m 30s
Run Integration tests with Python 3.11	3m 30s
Run Integration tests with Python 3.12	3m 31s
Test PIP Installable Packages	3m 26s
Upload Tarball	36s
	49m 21s

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