Remove `election_winner_details` container #2299

Job	Run time
Linux [UBSAN] [lmdb \| clang]	47m 56s
Linux [ASAN] [lmdb \| clang]	40m 14s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	45m 53s
Linux [TSAN] [lmdb \| clang]	44m 24s
macOS [UBSAN] [lmdb \| clang]	37m 25s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	44m 51s
macOS [ASAN] [lmdb \| clang]	33m 18s
Linux [UBSAN] [rocksdb \| clang]	56m 25s
macOS [TSAN] [lmdb \| clang]	35m 24s
Linux [ASAN] [rocksdb \| clang]	58m 49s
macOS [UBSAN] [rocksdb \| clang]	43m 31s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	1h 3m 22s
macOS [ASAN] [rocksdb \| clang]	53m 57s
macOS [TSAN] [rocksdb \| clang]	58m 38s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	57m 2s
	12h 1m 9s

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