gh-134584: Eliminate redundant refcounting from _BINARY_OP_SUBSCR_LIST_INT

[cocolato]

• Issue: Eliminate redundant refcounting in the JIT #134584

[Fidget-Spinner]

@cocolato in the future could you please check on the issue before opening a PR? I already assigned this to someone else. I wont close this PR but please keep that in mind in the future. Otherwise it makes things hard to coordinate.

[cocolato]

@cocolato in the future could you please check on the issue before opening a PR? I already assigned this to someone else. I wont close this PR but please keep that in mind in the future. Otherwise it makes things hard to coordinate.

Sorry about that. I'll close this PR and find other unassigned tasks to work on.

[Fidget-Spinner]

@cocolato no problem. Would you like to work on _UNPACK_SEQUENCE and _UNPACK_SEQUENCE_LIST? I can assign those to you. From this PR, it looks like you're a very capable contributor :).

[cocolato]

@cocolato no problem. Would you like to work on _UNPACK_SEQUENCE and _UNPACK_SEQUENCE_LIST? I can assign those to you. From this PR, it looks like you're a very capable contributor :).

Thank you for your reply. I'm pleased to work on this！

[Fidget-Spinner]

@cocolato, thanks for taking them up! I will also assign you _UNPACK_SEQUENCE_TUPLE, as it's very much the same thing.

[Fidget-Spinner]

@cocolato I realised unpack_sequence might cause stack overflow, so I need to discuss with Mark how to handle that.

In the meantime, this PR LGTM. I will merge it. Thanks for your contribution!