Database backend configuration #2603

Job	Run time
macOS [UBSAN] [lmdb \| clang]	33m 32s
Linux [UBSAN] [lmdb \| clang]	39m 21s
macOS [ASAN] [lmdb \| clang]	29m 57s
Linux [ASAN] [lmdb \| clang]	40m 12s
macOS [TSAN] [lmdb \| clang]	37m 55s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	39m 45s
macOS [UBSAN] [rocksdb \| clang]	40m 26s
Linux [TSAN] [lmdb \| clang]	42m 49s
macOS [ASAN] [rocksdb \| clang]	44m 34s
Linux [LEAK] [lmdb \| clang]	42m 45s
macOS [TSAN] [rocksdb \| clang]	54m 37s
Linux [UBSAN] [rocksdb \| clang]	51m 48s
Linux [ASAN] [rocksdb \| clang]	53m 19s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	59m 46s
Linux [LEAK] [rocksdb \| clang]	56m 24s
	11h 7m 10s

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