Make election behavior mutable to support dynamic behaviour transition #2498

Job	Run time
macOS [UBSAN] [lmdb \| clang]	27m 5s
Linux [UBSAN] [lmdb \| clang]	40m 14s
macOS [ASAN] [lmdb \| clang]	23m 17s
Linux [ASAN] [lmdb \| clang]	34m 5s
macOS [TSAN] [lmdb \| clang]	22m 34s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	32m 51s
macOS [UBSAN] [rocksdb \| clang]	28m 47s
macOS [ASAN] [rocksdb \| clang]	25m 34s
Linux [TSAN] [lmdb \| clang]	34m 2s
macOS [TSAN] [rocksdb \| clang]	24m 25s
Linux [LEAK] [lmdb \| clang]	34m 24s
Linux [UBSAN] [rocksdb \| clang]	39m 54s
Linux [ASAN] [rocksdb \| clang]	35m 4s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	34m 34s
Linux [LEAK] [rocksdb \| clang]	37m 24s
	7h 54m 14s

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