Add Default Min-Max Indices for MergeTree Columns

Add the ability to create min-max (skipping) indices by default for columns managed by MergeTree using settings add_minmax_index_for_numeric_columns (for numeric columns) and add_minmax_index_for_string_columns (for string columns). For now, both settings are disabled, so there is no behavior change yet. #74266 (Smita Kulkarni).