snapshots: read block from snapshots, add sender to txs file (#2996)

cmd/hack/hack.go

cmd/rpcdaemon/cli/config.go

cmd/rpcdaemon/commands/eth_subscribe_test.go

cmd/rpcdaemon/rpcdaemontest/test_util.go

cmd/rpcdaemon/services/eth_backend.go

cmd/utils/flags.go

eth/backend.go

eth/ethconfig/config.go

ethdb/privateapi/ethbackend.go

migrations/db_schema_version.go

migrations/migrations.go

turbo/cli/default_flags.go

turbo/cli/flags.go

turbo/snapshotsync/block_reader.go

turbo/snapshotsync/block_snapshots.go