Added support for multi-level attribute for function call (#2794) #7406

Job	Run time
Test CPython Interop (@pythoncall)	1m 40s
Test CPython Interop (@pythoncall)	1m 40s
Build Jupyter Kernel	3m 22s
Build Jupyter Kernel	3m 22s
LPython CI (3.10, ubuntu-latest)	8m 44s
LPython CI (3.10, ubuntu-latest)	8m 44s
Build LPython to WASM	5m 50s
Build LPython to WASM	5m 50s
LPython CI (3.10, macos-latest)	9m 24s
LPython CI (3.10, macos-latest)	9m 24s
Check Debug build	2m 35s
Check Debug build	2m 35s
Run Integration tests with Python 3.9	1m 53s
Run Integration tests with Python 3.9	1m 53s
LPython CI (3.10, windows-2019)	17m 11s
LPython CI (3.10, windows-2019)	17m 11s
Run Integration tests with Python 3.10	1m 57s
Run Integration tests with Python 3.10	1m 57s
Check Release build	2m 27s
Check Release build	2m 27s
Run SymPy tests	2m 19s
Run SymPy tests	2m 19s
Run Integration tests with Python 3.11	2m 6s
Run Integration tests with Python 3.11	2m 6s
Run Integration tests with Python 3.12	1m 40s
Run Integration tests with Python 3.12	1m 5s
Test LLVM 10	2m 35s
Test LLVM 10	2m 35s
Test PIP Installable Packages	1m 26s
Test PIP Installable Packages	1m 26s
Test LLVM 15	2m 43s
Test LLVM 15	2m 43s
Upload Tarball	34s
Upload Tarball	34s
Test LLVM 16	2m 39s
Test LLVM 16	2m 39s
	2h 21m 35s

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