Frontier scan client #2266

Job	Run time
macOS [UBSAN] [lmdb \| clang]	39m 54s
Linux [UBSAN] [lmdb \| clang]	43m 12s
macOS [ASAN] [lmdb \| clang]	32m 12s
Linux [ASAN] [lmdb \| clang]	43m 34s
macOS [TSAN] [lmdb \| clang]	32m 35s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	42m 59s
macOS [UBSAN] [rocksdb \| clang]	1h 0m 56s
macOS [ASAN] [rocksdb \| clang]	43m 32s
Linux [TSAN] [lmdb \| clang]	44m 32s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	39m 55s
macOS [TSAN] [rocksdb \| clang]	57m 34s
Linux [UBSAN] [rocksdb \| clang]	52m 37s
Linux [ASAN] [rocksdb \| clang]	58m 18s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	58m 53s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	58m 18s
	11h 49m 1s

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