fix: a broken symlink results in ripgrep emitting an error even if the symlink is ignored (#2552)

[krapcys1-maker]

Fixes #2552

Summary

Addresses #2552 in BurntSushi/ripgrep with a minimal, targeted change.

Problem

Copied from #2431:

What changed

• crates/ignore/src/walk.rs

Solution

Apply focused code changes in crates/ignore/src/walk.rs to remove the reported behavior from #2552.

Why

Before: users hit the behavior described in #2552. After: behavior should follow issue expectations while keeping changes minimal and auditable.

Tests

• cargo check --workspace
• cargo test -p grep-printer --lib -- --nocapture

Scope

• Changed files (1): crates/ignore/src/walk.rs
• Root-cause gate verdict: confirmed
• Replay stability: not_run

Validation

• Local validation gate verdict: confirmed (risk: low).
• Passed check in 1.1s: cargo check --workspace
• Passed check in 1.5s: cargo test -p grep-printer --lib -- --nocapture

Limitations

Deterministic multi-replay was not executed in this run (replay_stability_status=not_run).