Add to_utc_timestamp support in more dialects #806

Job	Run time
build-vegafusion-packages	1m 36s
build-vegafusion-jupyter-packages	9m 27s
build-vegafusion-python-embed-linux-64	11m 17s
build-vegafusion-python-embed-linux-arm64	11m 24s
build-vegafusion-python-embed-osx-64	20m 48s
build-vegafusion-python-embed-osx-arm64	21m 32s
build-vegafusion-python-embed-win-64	24m 21s
build-vegafusion-server-linux-64	10m 19s
build-vegafusion-server-linux-arm64	10m 33s
build-vegafusion-server-osx-64	26m 2s
build-vegafusion-server-osx-arm64	21m 53s
build-vegafusion-server-win-64	22m 34s
build-vegafusion-wasm	7m 35s
check-rust	7m 19s
test-rust (ubuntu-20.04)	25m 6s
test-rust (windows-2022)	41m 53s
test-rust (macos-11)	55m 16s
test-vegafusion-python-linux-64	6m 18s
test-vegafusion-jupyter-linux-64	25m 10s
test-vegafusion-python-osx-64	12m 16s
test-vegafusion-python-win-64	9m 49s
	6h 22m 28s

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