'AllPairs' support for untyped tables

[sl-at-ibm]

An overload for FilterBuilder.AllPairs is missing to handle untyped tables (i.e. Row-based).

Currently such a code fails:

filterBuilder.AllPairs(
      "metadata",
      new Dictionary<string, string>
      {
        { "language", "Italian" },
        { "edition", "Illustrated Edition" },
      }
    );

with:

Argument 1: cannot convert from 'string' to 'System.Linq.Expressions.Expression<System.Func<DataStax.AstraDB.DataApi.Tables.Row, System.Collections.Generic.IDictionary<string, string>>>'CS1503

Reference: slack