[CALCITE-6623] The MongoDB adapter throws a java.lang.ClassCastExcept… #281

Job	Run time
Windows (JDK 8)	16m 39s
Windows (JDK 17)	17m 49s
Windows (JDK 21)	17m 55s
Linux (JDK 11, Pacific/Chatham Timezone)	11m 7s
Linux (JDK 21)	11m 0s
Linux (JDK 17)	11m 9s
Linux (JDK 8, latest Guava, America/New_York Timezone)	13m 11s
Linux (JDK 8, oldest Guava, America/New_York Timezone)	11m 58s
ErrorProne (JDK 11, latest Guava)	7m 1s
Linux (JDK 11, Avatica main)	18m 28s
CheckerFramework (JDK 11)	11m 16s
CheckerFramework (JDK 11, oldest Guava)	11m 26s
Linux (JDK 23)	11m 6s
Linux (JDK 8) Slow Tests	5m 4s
macOS (JDK 21)	1h 0m 24s
Druid Tests	7m 16s
	4h 2m 49s

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