add set support in java gremlin lang #6426

Job	Run time
smoke	3m 10s
mvn clean install - jdk11	8m 21s
mvn clean install - jdk8	6m 54s
cache gremlin-server docker image	1m 57s
gremlin-console	10m 2s
gremlin-server default	14m 7s
gremlin-server unified	13m 51s
mvn clean install - jdk17	7m 7s
neo4j-gremlin	8m 52s
spark core (ubuntu-latest)	12m 57s
spark gryo (ubuntu-latest)	10m 15s
spark core (windows-latest)	3m 51s
spark gryo (windows-latest)	4m 5s
go	3m 10s
python	3m 24s
.NET	1m 57s
gremlin-driver	3m 52s
javascript (ubuntu-latest)	3m 53s
	2h 1m 45s

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