Bump net.snowflake:snowflake-jdbc from 3.20.0 to 3.21.0 #4220

Job	Run time
code-style (ubuntu)	49s
integration-tests-h2	15m 39s
integration-tests-postgresql	15m 57s
tests (ubuntu)	22m 2s
tests (windows)	31m 18s
	1h 25m 45s

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