Move assert to a dedicated header #2375

Job	Run time
macOS [UBSAN] [lmdb \| clang]	35m 19s
Linux [UBSAN] [lmdb \| clang]	42m 21s
macOS [ASAN] [lmdb \| clang]	29m 52s
Linux [ASAN] [lmdb \| clang]	42m 9s
macOS [TSAN] [lmdb \| clang]	32m 8s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	44m 26s
macOS [UBSAN] [rocksdb \| clang]	44m 19s
Linux [TSAN] [lmdb \| clang]	40m 43s
macOS [ASAN] [rocksdb \| clang]	43m 29s
Linux [LEAK] [lmdb \| clang]	40m 4s
macOS [TSAN] [rocksdb \| clang]	55m 5s
Linux [UBSAN] [rocksdb \| clang]	51m 42s
Linux [ASAN] [rocksdb \| clang]	56m 35s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	59m 29s
Linux [LEAK] [rocksdb \| clang]	59m 27s
	11h 17m 8s

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