build(cmake): link to proper OpenSSL libraries

[plexoos]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the CMake build configuration to properly link OpenSSL libraries using the modern CMake approach with imported targets instead of the legacy method.

• Replaces direct ssl library linking with proper OpenSSL package discovery
• Updates target linking to use CMake imported targets (OpenSSL::SSL and OpenSSL::Crypto)

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