[CALCITE-6730] Add CONVERT function(enabled in Oracle library) #14369

Job	Run time
Windows (JDK 17)	10m 34s
Windows (JDK 8)	9m 50s
Linux (JDK 8, oldest Guava, America/New_York Timezone)	11m 3s
Windows (JDK 21)	15m 0s
Linux (JDK 11, Pacific/Chatham Timezone)	10m 35s
Linux (JDK 8, latest Guava, America/New_York Timezone)	12m 17s
Linux (JDK 21)	12m 10s
Linux (JDK 17)	10m 18s
Linux (JDK 11, Avatica main)	14m 20s
Linux (JDK 23)	10m 1s
CheckerFramework (JDK 11)	10m 46s
CheckerFramework (JDK 11, oldest Guava)	12m 23s
ErrorProne (JDK 11, latest Guava)	4m 3s
macOS (JDK 21)	37m 46s
Druid Tests	7m 0s
Linux (JDK 8) Slow Tests	0s
	3h 8m 6s

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