perf(BaseGrammar): Avoid isInstanceOf in wrapColumn

`isInstanceOf` takes about 30-40 ms per column.  For just one table with
6 columns, this is close to a quarter of a second.  This adds up.

Instead, just checking if the variable is an object that has a `getSQL`
key (which we assume is a method), we save all of that time.

models/Grammars/BaseGrammar.cfc

@@ -700,7 +700,11 @@ component displayname="Grammar" accessors="true" {
     * @return string
     */
     public string function wrapColumn( required any column ) {
-        if ( isInstanceOf( column, "qb.models.Query.Expression" ) ) {
+        // In this case, isInstanceOf takes ~30 ms while this takes ~0 ms
+        if ( ! isSimpleValue( column ) &&
+             isObject( column ) &&
+             structKeyExists( column, "getSQL" )
+        ) {
             return column.getSQL();
         }