Perform ledger upgrade in batches #2199

Job	Run time
Linux [UBSAN] [lmdb \| clang]	39m 30s
Linux [ASAN] [lmdb \| clang]	39m 6s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	43m 23s
macOS [UBSAN] [lmdb \| clang]	37m 48s
Linux [TSAN] [lmdb \| clang]	42m 6s
macOS [ASAN] [lmdb \| clang]	30m 34s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	41m 25s
macOS [TSAN] [lmdb \| clang]	33m 39s
Linux [UBSAN] [rocksdb \| clang]	53m 5s
macOS [UBSAN] [rocksdb \| clang]	48m 28s
Linux [ASAN] [rocksdb \| clang]	57m 57s
macOS [ASAN] [rocksdb \| clang]	37m 58s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	56m 23s
macOS [TSAN] [rocksdb \| clang]	56m 17s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	58m 2s
	11h 15m 41s

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