Revert "fix(ck): prevent int32 overflow in tensor descriptor element space size" (#10547)

[ozturkosu]

Revert of #10547

Reverts #10547 ("fix(ck): prevent int32 overflow in tensor descriptor element space size", squash commit 235faade) on develop, per team direction due to a CI test failure introduced by that change.

⚠️ Important — this re-opens a security fix

#10547 fixed ROCM‑29071 (bug-bounty): a signed int32 overflow in calculate_element_space_size_impl() / make_naive_tensor_descriptor() that causes an out-of-bounds GPU write (CWE‑787) in grouped conv bwd-weight when K·C > INT32_MAX. Reverting restores that vulnerability.

A re-fix must follow — track under ROCM‑29071. The original fix's own note explains the constraint (a blanket static_cast<long_index_t> broke the gfx950/gfx1201/Windows math-libs build by flipping IsKnownAtCompileTime() to false; the merged version used widen_runtime_index_to_long() to widen only runtime operands). The re-fix should preserve that behavior while resolving the CI test failure that triggered this revert.

Files reverted

• include/ck/tensor_description/tensor_descriptor_helper.hpp
• test/util/CMakeLists.txt
• test/util/unit_tensor_descriptor_element_space_size.cpp (removed)

cc the ROCM‑29071 owners.

[therock-pr-bot]

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Check	Status	Details
📝 PR Description	✅ Pass	—
⛔ Forbidden Files	✅ Pass	—
🧪 Unit Test	⚠️ Warning	Error: Source/code files changed without an accompanying unit test. Expected: add at least one test file named like test_<name>.py / test_<name>.cpp (or <name>_test.*). Current: code file(s) changed: projects/composablekernel/include/ck/tensor_description/tensor_descriptor_helper.hpp; no test file found
🔎 pre-commit	✅ Pass	—
🚫 Draft PR	🔜 To Be Enabled	—
🚩 Feature Flag	🔜 To Be Enabled	—
📊 Code Coverage	🔜 To Be Enabled	—
🤖 therock-pr-bot	✅ Pass	—

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[therock-pr-bot]

🎉 All checks passed! This PR is ready for review.

[JiaLuo-CAN]

Close the revert PR. Fixes required has been done in PR #10043.