Remove usages of frontiers table from ledger_processor block checks #1384

Job	Run time
Linux [UBSAN] [lmdb \| clang]	38m 45s
macOS [UBSAN] [lmdb \| clang]	38m 26s
Linux [ASAN] [lmdb \| clang]	39m 13s
macOS [ASAN] [lmdb \| clang]	28m 42s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	36m 57s
macOS [TSAN] [lmdb \| clang] (Errors Ignored)	29m 43s
Linux [TSAN] [lmdb \| clang] (Errors Ignored)	37m 56s
macOS [UBSAN] [rocksdb \| clang]	41m 55s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	38m 46s
macOS [ASAN] [rocksdb \| clang]	39m 20s
Linux [UBSAN] [rocksdb \| clang]	42m 56s
macOS [TSAN] [rocksdb \| clang] (Errors Ignored)	47m 46s
Linux [ASAN] [rocksdb \| clang]	47m 7s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	48m 8s
Linux [TSAN] [rocksdb \| clang] (Errors Ignored)	1h 35m 45s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	12m 51s
	11h 4m 16s

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