Bugfix/fix binary subscr class getitem

[tejapulagam]

Fix type subscript handling in binary_subscr_handler

What does this PR do?

This PR addresses issue #2300 by attempting to fix how the interpreter handles type subscripts (e.g., list[int]) in the binary_subscr_handler.

• Adds logic in the BINARY_SUBSCR handler to check if tos1 is a type. If it is, it uses class_getitem instead of getitem.

• Adds a test to test_interpreter.py.

Current Problem:
When using thunder.jit() on functions that return parameterized types, the interpreter incorrectly processes type subscripts through the standard getitem path instead of recognizing them as type operations.

Example failing case:

def fn():
    return list[int]

thunder.jit(fn)()  # Currently fails

Open questions:

• Is class_getitem the correct fix because currently its usage for this results in a notImplementedError?
• Is there a better way check for the type subscripts because the current check does not work?

[t-vi]

Supergood, thank you @tejapulagam