Fix CMake CMP0135 warnings for ExternalProject downloads#5083

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mvanhorn wants to merge 3 commits intoponylang:mainfrom

mvanhorn:fix-cmake-warnings

Commits on Mar 27, 2026

Fix CMake CMP0135 warnings for ExternalProject downloads

mvanhorn
and
claude
committed
Use DOWNLOAD_EXTRACT_TIMESTAMP instead of cmake_policy
mvanhorn
committed
fix: use if(POLICY CMP0135) guard for CMake 3.21 compatibility
mvanhorn
committed