fix(CI): Fix Ubuntu 20.04 with OpenSSL 3 installed: undefined reference to ERR_peek_last_error_all

[Samunroyu]

fix #2340

Different OS Versions are using the same thirdparty-bin-src images. We need to set ENV in DockerFile when OS Version is ubuntu 2004. And avoiding ENV affect other OS.

[acelyc111-bot]

Review: Fix Ubuntu 20.04 with OpenSSL 3 build issues

Summary: Fixes Docker build failures on Ubuntu 20.04 when OpenSSL 3 is installed by adding proper symlinks for shared libraries and setting environment variables for CMake/pkg-config/ld.

What's good:

• Symlinks libssl.so.3 and libcrypto.so.3 into system library path — this is the key fix for the "undefined reference" errors
• Proper env vars set (CMAKE_PREFIX_PATH, PKG_CONFIG_PATH, LD_LIBRARY_PATH, LIBRARY_PATH, CPATH) so downstream tools can find OpenSSL 3
• Multi-stage build pattern (stage-${OS_VERSION}) allows OS-specific config without duplication
• Copies headers to /usr/include/openssl/ for compatibility with projects expecting system paths

Minor notes:

• ldconfig -v changed to ldconfig — removes verbose output from build logs, good call
• The multi-stage approach is clean but the intermediate stages (stage-rockylinux9, stage-ubuntu2204, stage-ubuntu1804) are just pass-throughs — consider adding a comment explaining they're placeholders for future OS-specific configs

Verdict: ✅ Approve — Correct fix for a real build blocker. Ready to merge.