shader: align address-memory buffer bindings

tests/ResourceTrackingTests.cpp

@@ -939,6 +939,12 @@ void TestDynamicSrtReadRemainsExplicit() {
             FindBinding(fixture.program.bindings,
                         DescriptorBindingKind::AddressMemory) != nullptr,
         "dynamic scalar read received the wrong resource bindings");
+  Check(fixture.program.bindings.memory_offset_dword ==
+                fixture.program.bindings.user_data_registers.size() &&
+            fixture.program.bindings.memory_offset_count == 2u &&
+            fixture.program.bindings.ShaderDataDwords() ==
+                fixture.program.bindings.memory_offset_dword + 1u,
+        "unified memory-offset layout is inconsistent");
 }
 
 void TestPhiValidation() {