Move assert to a dedicated header #2434

Job	Run time
macOS [UBSAN] [lmdb \| clang]	36m 9s
Linux [UBSAN] [lmdb \| clang]	37m 30s
Linux [ASAN] [lmdb \| clang]	40m 34s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	37m 3s
macOS [ASAN] [lmdb \| clang]	30m 47s
Linux [TSAN] [lmdb \| clang]	39m 34s
macOS [TSAN] [lmdb \| clang]	34m 12s
Linux [LEAK] [lmdb \| clang]	38m 32s
Linux [UBSAN] [rocksdb \| clang]	50m 54s
macOS [UBSAN] [rocksdb \| clang]	44m 33s
macOS [ASAN] [rocksdb \| clang]	39m 37s
Linux [ASAN] [rocksdb \| clang]	52m 37s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	55m 40s
macOS [TSAN] [rocksdb \| clang]	48m 31s
Linux [LEAK] [rocksdb \| clang]	53m 36s
	10h 39m 49s

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