test(e2e): fix filtered upload path assertion

[drew]

Summary

Fix the remaining Rust e2e regression after #960 by restoring the git-filtered upload expectation to the unwrapped destination path. sandbox upload preserves the basename for plain directory uploads, but the git-filtered code path streams the selected subtree contents directly.

Related Issue

Follow-up to #960
Failed workflow: https://github.com/NVIDIA/OpenShell/actions/runs/24897579655/job/72908183051

Changes

• restore the .gitignore filtered upload test to download from /sandbox/filtered
• keep the basename-preserving expectations for the non-git-filtered directory upload cases from test(e2e): fix rust upload path assertions #960 unchanged

Testing

• mise run pre-commit passes
• Unit tests added/updated
• E2E tests added/updated (if applicable)
• cargo fmt --all -- --check
• RUSTC_WRAPPER= CARGO_BUILD_JOBS=1 cargo test --manifest-path e2e/rust/Cargo.toml --features e2e --test sync --no-run
• Prior local mise run pre-commit attempts in this workspace are still blocked by an unrelated sccacheToo many open files failure during rust:check

Checklist

• Follows Conventional Commits
• Commits are signed off (DCO)
• Architecture docs updated (if applicable)

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[pimlock]

/ok to test 61ef4b6

[pimlock]

/ok to test a878af4