Move assert to a dedicated header #2412

Job	Run time
Linux [UBSAN] [lmdb \| clang]	15m 23s
macOS [UBSAN] [lmdb \| clang]	33m 1s
Linux [ASAN] [lmdb \| clang]	12m 13s
macOS [ASAN] [lmdb \| clang]	40m 0s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	12m 53s
macOS [TSAN] [lmdb \| clang]	32m 21s
macOS [UBSAN] [rocksdb \| clang]	49m 1s
Linux [TSAN] [lmdb \| clang]	13m 1s
macOS [ASAN] [rocksdb \| clang]	39m 29s
Linux [LEAK] [lmdb \| clang]	12m 28s
Linux [UBSAN] [rocksdb \| clang]	15m 15s
macOS [TSAN] [rocksdb \| clang]	1h 1m 26s
Linux [ASAN] [rocksdb \| clang]	13m 3s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	12m 31s
Linux [LEAK] [rocksdb \| clang]	12m 6s
	6h 14m 11s

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