remove explicit version from conan profile - use system

[SavenkovIgor]

No description provided.

[Copilot]

Pull request overview

This PR updates the Conan base Clang profile to stop referencing version-suffixed compiler executables, intending to rely on the system-default clang/clang++ instead.

Changes:

• Switch CC from clang-20 to clang.
• Switch CXX from clang++-20 to clang++.

Comments suppressed due to low confidence (1)

conanfiles/profile/base/clang:7

• CC/CXX were changed to clang/clang++, but this profile still pins compiler.version=20. Unless the environment guarantees that clang resolves to Clang 20 (e.g., via PATH/update-alternatives), Conan will believe it is building with Clang 20 while actually invoking a different version, which can break builds and/or produce incorrect package IDs. Either keep clang-20/clang++-20, or remove/align the pinned compiler version and ensure CI/dev environments set the intended default compiler.

CXX=clang++

[settings]
compiler=clang
compiler.version=20