table: Added shortcuts to Queryx
table: Added shortcuts to Queryx

These shortucuts allows to write shorter more straightforward code.
It allows to write:

```
clusters.InsertQuery(session).BindStruct(r).ExecRelease()
```

instead of:

```
tmt, names := clusters.Insert()
session.Query(stmt,names).BindStruct(r).ExecRelease()
```

scylladb/gocqlx