[reland] Add int1 to int7 dtypes

Summary:
Similar to #117208, we want to add int1 to int7 for edge use cases
for weight quantization

Test Plan:
python test/test_quantization.py -k test_uint4_int4_dtype

Reviewers:

Subscribers:

Tasks:

Tags:

ghstack-source-id: 9979fb52ef74c78a1c1f024bb1697ed51c008954
Pull Request resolved: #137928

aten/src/ATen/DLConvertor.cpp

@@ -22,6 +22,13 @@ DLDataType getDLDataType(const Tensor& t) {
     case ScalarType::UInt64:
       dtype.code = DLDataTypeCode::kDLUInt;
       break;
+    case ScalarType::Int1:
+    case ScalarType::Int2:
+    case ScalarType::Int3:
+    case ScalarType::Int4:
+    case ScalarType::Int5:
+    case ScalarType::Int6:
+    case ScalarType::Int7:
     case ScalarType::Char:
       dtype.code = DLDataTypeCode::kDLInt;
       break;