mdbx support (#1235)

.dockerignore

Dockerfile

Makefile

cmd/hack/hack.go

cmd/integration/commands/flags.go

cmd/integration/commands/refetence_db.go

cmd/integration/commands/reset_state.go

cmd/integration/commands/root.go

cmd/integration/commands/stages.go

cmd/integration/commands/state_stages.go

cmd/state/state

common/dbutils/bucket.go

eth/stagedsync/stage_senders.go

eth/stagedsync/stage_txpool.go

ethdb/interface.go

ethdb/kv_abstract.go

ethdb/kv_abstract_test.go

ethdb/kv_lmdb.go

ethdb/kv_mdbx.go

ethdb/kv_migrator_test.go