[mlir][python]Python Bindings for select edit operations on Block arguments (#94305)

The PR implements MLIR Python Bindings for a few simple edit operations
on Block arguments, namely, `add_argument`, `erase_argument`, and
`erase_arguments`.

Author: sdasgup3

IRCore.cpp

@@ -3238,6 +3238,19 @@ void mlir::python::populateIRCore(py::module &m) {
             return PyBlockArgumentList(self.getParentOperation(), self.get());
           },
           "Returns a list of block arguments.")
+      .def(
+          "add_argument",
+          [](PyBlock &self, const PyType &type, const PyLocation &loc) {
+            return mlirBlockAddArgument(self.get(), type, loc);
+          },
+          "Append an argument of the specified type to the block and returns "
+          "the newly added argument.")
+      .def(
+          "erase_argument",
+          [](PyBlock &self, unsigned index) {
+            return mlirBlockEraseArgument(self.get(), index);
+          },
+          "Erase the argument at 'index' and remove it from the argument list.")
       .def_property_readonly(
           "operations",
           [](PyBlock &self) {