Fix: handle local Rocq name collisions in check-porting.py

[lzy0505]

Description

Add file names as prefix to resolve collisions.

Checklist

• My code follows the mathlib naming and code style conventions
• I have added my name to the authors section of any appropriate files

Generative AI Guidelines

AI assistance is permitted when making contributions to Iris-Lean, however, generative AI systems tend to produce code which takes a long time to review.
Please carefully review your code to ensure it meets the following standards.

• Your PR should avoid duplicating constructions found in Iris-Lean or in the Lean standard library.
• have statements that do not aid readability or code reuse should be inlined.
• Your proofs should be shortened such that their overall structure is explicable to a human reader. As a goal, aim to express one idea per line.
• In general, proofs should not perform substantially more case splitting than their Rocq counterparts.

In our experience, a good place to begin refactoring is by re-arranging and combining independent tactic invocations.
We also find that pointing generative AI systems to the Mathlib code style guidelines can help them perform some of this refactoring work.

[alvinylt]

@lzy0505 There are two items named persistently_absorbing in Iris-Rocq: one as a lemma in bi/interface.v and another as an instance of Absorbing in bi/derived_laws.v.

It shows up only once on the porting website. Does this fix resolve this issue?

[lzy0505]

Good spot. No I don't think so. I will fix it later.