Use read/write transaction variant in vote generator #1960

Job	Run time
macOS [UBSAN] [lmdb \| clang]	34m 47s
Linux [UBSAN] [lmdb \| clang]	40m 8s
macOS [ASAN] [lmdb \| clang]	29m 25s
Linux [ASAN] [lmdb \| clang]	37m 20s
macOS [TSAN] [lmdb \| clang]	28m 12s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	38m 37s
macOS [UBSAN] [rocksdb \| clang]	38m 39s
Linux [TSAN] [lmdb \| clang]	37m 35s
macOS [ASAN] [rocksdb \| clang]	35m 5s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	37m 43s
macOS [TSAN] [rocksdb \| clang]	46m 58s
Linux [UBSAN] [rocksdb \| clang]	44m 19s
Linux [ASAN] [rocksdb \| clang]	47m 52s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	51m 7s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	48m 11s
	9h 55m 58s

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