[mlir] Fix CallOpInterface extraClassDeclaration to be fully namespace qualified (#81258)

`extraClassDeclaration` of `CallOpInterface` can be inherited by other
`OpInterfaces` into foreign namespaces, thus types must be fully
qualified to prevent compiler errors, for example:

    def MyCaller : OpInterface<"MyCaller", [CallOpInterface]> {
        let cppNamespace = "::MyNamespace";
    }

Author: RIscRIpt

mlir/include/mlir/Interfaces/CallInterfaces.td

@@ -68,7 +68,7 @@ def CallOpInterface : OpInterface<"CallOpInterface"> {
     /// `symbolTable` is an optional parameter that will allow for using a
     /// cached symbol table for symbol lookups instead of performing an O(N)
     /// scan.
-    Operation *resolveCallable(SymbolTableCollection *symbolTable = nullptr);
+    ::mlir::Operation *resolveCallable(::mlir::SymbolTableCollection *symbolTable = nullptr);
   }];
 }