Improve nano test system (#4731) #2244

Job	Run time
macOS [UBSAN] [lmdb \| clang]	34m 21s
Linux [UBSAN] [lmdb \| clang]	42m 14s
macOS [ASAN] [lmdb \| clang]	28m 47s
Linux [ASAN] [lmdb \| clang]	40m 11s
macOS [TSAN] [lmdb \| clang]	32m 19s
macOS [UBSAN] [rocksdb \| clang]	39m 49s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	43m 1s
macOS [ASAN] [rocksdb \| clang]	38m 54s
Linux [TSAN] [lmdb \| clang]	39m 53s
macOS [TSAN] [rocksdb \| clang]	50m 35s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	42m 36s
Linux [UBSAN] [rocksdb \| clang]	52m 34s
Linux [ASAN] [rocksdb \| clang]	54m 45s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	57m 14s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	53m 26s
	10h 50m 39s

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