Misc fixes for partial shapes (#1987)

src/ngraph/op/avg_pool.cpp

@@ -130,7 +130,7 @@ void op::AvgPoolBackprop::validate_and_infer_types()
                                       m_window_movement_strides,
                                       m_include_padding_in_avg_computation);
 
-    const PartialShape& delta_shape = get_input_shape(0);
+    const PartialShape& delta_shape = get_input_partial_shape(0);
 
     NODE_VALIDATION_ASSERT(this, forward_result_shape.compatible(delta_shape))
         << "Inferred forward output shape does not match delta shape (inferred forward output "

src/ngraph/op/convert.cpp

@@ -30,7 +30,7 @@ op::Convert::Convert(const shared_ptr<Node>& arg, const element::Type& element_t
 
 void op::Convert::validate_and_infer_types()
 {
-    set_output_type(0, m_element_type, get_input_shape(0));
+    set_output_type(0, m_element_type, get_input_partial_shape(0));
 }
 
 shared_ptr<Node> op::Convert::copy_with_new_args(const NodeVector& new_args) const

src/ngraph/op/convolution.cpp

@@ -476,7 +476,7 @@ void op::ConvolutionBackpropFilters::validate_and_infer_types()
 
     const PartialShape& data_batch_shape = get_input_partial_shape(0);
     element::Type data_batch_et = get_input_element_type(0);
-    const PartialShape& delta_shape = get_input_shape(1);
+    const PartialShape& delta_shape = get_input_partial_shape(1);
     element::Type delta_et = get_input_element_type(1);
 
     element::Type forward_result_et;