[b/328439985] Convert negative SQRT operands to NULL in dialect.tdd (… #192

Job	Run time
Linux (JDK 11), Avatica main	9m 48s
CheckerFramework (JDK 11)	9m 28s
Error Prone (JDK 11)	4m 13s
Error Prone (JDK 11), Guava 31	4m 2s
CheckerFramework (JDK 11), Guava 29	9m 14s
Druid Tests	6m 57s
Linux (JDK 11), Pacific/Chatham Timezone	8m 36s
Linux (JDK 17)	8m 19s
Linux (JDK 18)	7m 25s
Linux (JDK 8), Oldest Guava, America/New_York Timezone	7m 56s
Linux (JDK 8) Slow Tests	0s
macOS (JDK 18)	14m 11s
Windows (JDK 17)	12m 5s
Windows (JDK 8)	13m 15s
	1h 55m 29s

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