feat(data_structures): add SparseStack::last_mut method

[overlookmotel]

Add SparseStack::last_mut method, as companion to SparseStack::last.

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[overlookmotel]

• feat(data_structures): add SparseStack::last_mut method #7528 👈 (View in Graphite)
• refactor(transformer/class-properties): remove defunct comments #7527
• main

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[overlookmotel]

I think I understand the stack types better than anyone else at present, so merging without review.

[overlookmotel]

Merge activity

• Nov 28, 11:32 AM EST: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Nov 28, 11:36 AM EST: A user added this pull request to the Graphite merge queue.
• Nov 28, 11:45 AM EST: A user merged this pull request with the Graphite merge queue.

[codspeed-hq]

CodSpeed Performance Report

Merging #7528 will not alter performance

_{Comparing 11-28-feat_data_structures_add_sparsestack_last_mut_method (defaf4b) with main (d5aaee7)}

Summary

✅ 30 untouched benchmarks

[overlookmotel]

@Boshen Any idea why Dunqing was requested as reviewer on this PR? It doesn't touch any of the crates he's listed as owner of. Is this a bug in Graphite? Or have we configured it wrong?