[Lane 4 · kotlin-core] TransposedConv2d — ground-truth test for convTranspose2d #1376

Sub-issue of #1371 ([Feature]: TransposedConv2d — convTranspose2d op, CPU kernel, backward and StableHLO lowering).

Lane: 4 · Ground-truth/CI
Skill needed: Kotlin tests; the ground-truth harness is documented in skainet-test/skainet-test-groundtruth/TESTING.md.
Size: s (a few hours)
Blocked by: #1372, #1373

What to do

1. Wire the Lane-1 PyTorch cases into skainet-test/skainet-test-groundtruth the same way an existing conv op is wired.
2. Run the ground-truth job locally as described in TESTING.md.

Acceptance

• The ground-truth workflow runs the new cases and passes
• Result reported back on the parent issue

Notes

If something here turns out to be wrong or much bigger than the size label, comment on this issue or open a specific bug instead of blocking the parent.

Coverage matrix: docs/modules/ROOT/pages/reference/ops-status-matrix.adoc · How lanes work: Issue taxonomy