[mlir][python] Fix ir.Value type to not break other types (llvm#167930)

Change in llvm#166148 caused breaks
for some other types.
Specifically this error was seen in a downstream project
```
 _ods_ir.OpOperandList[_ods_ir.IntegerType]:

TypeError: type 'iree.compiler._mlir_libs._mlir.ir.OpOperandList' is not subscriptable

```
This PR tries to make those changes not affect the other types

---------

Signed-off-by: Nirvedh Meshram <[email protected]>

Author: nirvedhmeshram

mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp

@@ -437,7 +437,8 @@ static void emitElementAccessors(
           type = std::strcmp(kind, "operand") == 0 ? "_ods_ir.Value"
                                                    : "_ods_ir.OpResult";
         }
-        if (std::strcmp(kind, "operand") == 0) {
+        if (std::strcmp(type.c_str(), "_ods_ir.Value") == 0 ||
+            std::strcmp(type.c_str(), "_ods_ir.OpResult") == 0) {
           StringRef pythonType = getPythonType(element.constraint.getCppType());
           if (!pythonType.empty())
             type += "[" + pythonType.str() + "]";
@@ -473,7 +474,8 @@ static void emitElementAccessors(
       if (!element.isVariableLength() || element.isOptional()) {
         type = std::strcmp(kind, "operand") == 0 ? "_ods_ir.Value"
                                                  : "_ods_ir.OpResult";
-        if (std::strcmp(kind, "operand") == 0) {
+        if (std::strcmp(type.c_str(), "_ods_ir.Value") == 0 ||
+            std::strcmp(type.c_str(), "_ods_ir.OpResult") == 0) {
           StringRef pythonType = getPythonType(element.constraint.getCppType());
           if (!pythonType.empty())
             type += "[" + pythonType.str() + "]";