Bump flatted from 3.2.7 to 3.4.2 in /plugins/grafana-custom-plugins/grafana-dependency-plugin #3470

Job	Run time
Check whether clickhouse-monitor image needs to be built based on diff	24s
Check whether theia-manager image needs to be built based on diff	18s
Check whether spark-jobs image needs to be built based on diff	16s
Check whether clickhouse-server image needs to be built based on diff	19s
build-spark-jobs	0s
build-theia-manager	0s
build-clickhouse-server	-1s
build-clickhouse-monitor	0s
	1m 16s

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