ZJIT: skip empty inline frame pass when no inlining occurred

[Nish916]

Summary

Avoid running Function::eliminate_empty_inline_frames in optimizer iterations where inline_methods did not inline anything.

optimize() already records the result of inline_methods in did_inline, so this change uses that existing signal to skip a pass that cannot have new inline-frame pairs to clean up in that iteration.

This keeps the pass unchanged for iterations that actually performed inlining and avoids the unnecessary scan otherwise.

Fixes #1035.

Validation

• git diff --check ✅
• Local Rust tests were not run because cargo is not installed in the available local environment; repository CI should provide authoritative build/test validation.