core, eth, ethdb, trie: simplify range proofs

core/rawdb/table.go

core/state/snapshot/generate.go

eth/protocols/snap/sync.go

ethdb/batch.go

ethdb/leveldb/leveldb.go

ethdb/memorydb/memorydb.go

tests/fuzzers/rangeproof/rangeproof-fuzzer.go

tests/fuzzers/stacktrie/trie_fuzzer.go

trie/notary.go

trie/proof.go

trie/proof_test.go

trie/trie_test.go