Fix out of order ledger notifications #2583

Job	Run time
macOS [UBSAN] [lmdb \| clang]	32m 25s
Linux [UBSAN] [lmdb \| clang]	38m 53s
macOS [ASAN] [lmdb \| clang]	28m 5s
Linux [ASAN] [lmdb \| clang]	41m 15s
macOS [TSAN] [lmdb \| clang]	31m 44s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	41m 26s
macOS [UBSAN] [rocksdb \| clang]	44m 34s
Linux [TSAN] [lmdb \| clang]	43m 0s
macOS [ASAN] [rocksdb \| clang]	39m 6s
Linux [LEAK] [lmdb \| clang]	38m 31s
macOS [TSAN] [rocksdb \| clang]	52m 17s
Linux [UBSAN] [rocksdb \| clang]	47m 56s
Linux [ASAN] [rocksdb \| clang]	53m 3s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	57m 32s
Linux [LEAK] [rocksdb \| clang]	53m 28s
	10h 43m 15s

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