Add Sparse pushdown kernels for is_constant, sum, and compare #2475

Job	Run time
check-java-publish-build (x86_64-unknown-linux-gnu, runs-on=26509989878/runner=amd64-medium/image...	2m 2s
Python (wheel build)	6m 38s
check-java-publish-build (aarch64-unknown-linux-gnu, runs-on=26509989878/runner=arm64-medium/imag...	2m 37s
Rust publish dry-run	1m 35s
Compat check / compat-test	4m 36s
	17m 28s

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