Telemetry database backend #2142

Job	Run time
Linux [UBSAN] [lmdb \| clang]	38m 16s
macOS [UBSAN] [lmdb \| clang]	34m 23s
macOS [ASAN] [lmdb \| clang]	26m 42s
macOS [TSAN] [lmdb \| clang]	30m 6s
macOS [UBSAN] [rocksdb \| clang]	46m 29s
Linux [ASAN] [lmdb \| clang]	39m 9s
macOS [ASAN] [rocksdb \| clang]	39m 59s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	38m 56s
macOS [TSAN] [rocksdb \| clang]	53m 43s
Linux [TSAN] [lmdb \| clang]	39m 21s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	39m 24s
Linux [UBSAN] [rocksdb \| clang]	50m 27s
Linux [ASAN] [rocksdb \| clang]	57m 40s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	55m 53s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	58m 25s
	10h 48m 53s

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