v2: Implement transforms against DataFusion DataFrame, drop custom UDFs #1008

Job	Run time
check-vegafusion-python	10m 47s
build-vegafusion-python-linux-64	3m 3s
build-vegafusion-python-osx-arm64	13m 6s
build-vegafusion-python-linux-arm64	3m 20s
build-vegafusion-python-osx-64	3h 10m 41s
build-vegafusion-python-win-64	10m 44s
build-vegafusion-wasm	11m 34s
check-rust	4m 20s
build-vegafusion-server-linux-64	13m 2s
build-vegafusion-server-linux-arm64	2m 8s
build-vegafusion-server-osx-64	6m 19s
build-vegafusion-server-osx-arm64	12m 43s
build-vegafusion-server-win-64	28m 16s
test-rust (ubuntu-20.04)	23m 15s
test-rust (windows-2022)	43m 24s
test-rust (macos-14)	32m 23s
test-vegafusion-python-linux-64	27m 14s
test-vegafusion-python-win-64	2m 1s
test-vegafusion-python-osx-arm64	1m 4s
	7h 19m 24s

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