Lift bin and timeunit transforms out of facets #848

Job	Run time
build-vegafusion-python-embed-linux-arm64	11m 38s
build-vegafusion-python-embed-linux-64	10m 45s
build-vegafusion-python-embed-osx-64	24m 14s
build-vegafusion-python-embed-win-64	25m 11s
build-vegafusion-wasm	7m 34s
check-rust	9m 48s
test-rust (ubuntu-20.04)	24m 35s
test-rust (windows-2022)	43m 38s
test-rust (macos-11)	48m 33s
build-vegafusion-jupyter-packages	9m 26s
build-vegafusion-packages	1m 25s
build-vegafusion-python-embed-osx-arm64	22m 31s
build-vegafusion-server-linux-64	10m 1s
build-vegafusion-server-linux-arm64	10m 27s
build-vegafusion-server-osx-64	21m 26s
build-vegafusion-server-osx-arm64	21m 28s
build-vegafusion-server-win-64	23m 0s
test-vegafusion-jupyter-linux-64	25m 22s
test-vegafusion-python-linux-64	6m 41s
test-vegafusion-python-osx-64	11m 9s
test-vegafusion-python-win-64	9m 29s
	6h 18m 21s

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