go/runtime: ensure we destroy a SQLite store on Open error

We were not properly tearning down these instances, which lead to
lingering open RocksDB instances and open file descriptors to removed
files, preventing disk from being reclaimed.

go/runtime/derive.go

@@ -52,9 +52,11 @@ func NewDeriveApp(host *FlowConsumer, shard consumer.Shard, recorder *recoverylo
 			base.drop()
 			return nil, fmt.Errorf("building SQLite backing store: %w", err)
 		} else if err = sqlite.Open(""); err != nil {
+			sqlite.Destroy()
 			base.drop()
 			return nil, fmt.Errorf("opening SQLite backing store: %w", err)
 		} else if err = sqlite.SQLiteDB.Close(); err != nil {
+			sqlite.Destroy()
 			base.drop()
 			return nil, fmt.Errorf("closing SQLite DB in preparation for opening it again: %w", err)
 		}