fix: more clippy::mismatched-lifetime-syntaxes due to rust update 1.89.0

[fdefelici]

Description

This PR fixes additional occurrences of clippy::mismatched-lifetime-syntaxes that appeared after updating to Rust 1.89.0.

These warnings were detected when running cargo check --tests locally but were not caught by CI during PR #6356.

Applicable issues

• fixes #

Additional info (benefits, drawbacks, caveats)

Checklist

• Test coverage for new or modified code paths
• Changelog is updated
• Required documentation changes (e.g., docs/rpc/openapi.yaml and rpc-endpoints.md for v2 endpoints, event-dispatcher.md for new events)
• New clarity functions have corresponding PR in clarity-benchmarking repo
• New integration test(s) added to bitcoin-tests.yml

[codecov]

Codecov Report

❌ Patch coverage is 95.45455% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 74.86%. Comparing base (c21aea7) to head (0c5720d).
⚠️ Report is 8 commits behind head on develop.

Files with missing lines	Patch %	Lines
stackslib/src/net/tests/download/epoch2x.rs	0.00%	1 Missing ⚠️

❌ Your project status has failed because the head coverage (74.86%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6360      +/-   ##
===========================================
- Coverage    75.81%   74.86%   -0.95%     
===========================================
  Files          552      552              
  Lines       351807   351816       +9     
===========================================
- Hits        266724   263399    -3325     
- Misses       85083    88417    +3334     

Files with missing lines	Coverage Δ
stackslib/src/chainstate/stacks/index/marf.rs	82.61% <100.00%> (ø)
stackslib/src/net/tests/convergence.rs	84.27% <100.00%> (-8.99%)	⬇️
stackslib/src/net/tests/download/epoch2x.rs	10.78% <0.00%> (+10.78%)	⬆️

... and 320 files with indirect coverage changes

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.