PYTHON-5806 [PoC] rename network_layer.py to network_layer_shared.py #3803

Job	Run time
Make SDist	1m 3s
Build wheels for manylinux_i686	2m 24s
Build wheels for manylinux_aarch64	14m 32s
Build wheels for manylinux_s390x	15m 26s
Build wheels for macos	4m 4s
Build wheels for manylinux_ppc64le	12m 52s
Build wheels for win_amd6	4m 52s
Build wheels for manylinux_x86_64	2m 9s
Build wheels for win_arm64	6m 21s
Build wheels for win32	4m 49s
Download Wheels	10s
	1h 8m 42s

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