Simplify Clang installation

Author: petk

.github/workflows/ci.yaml

@@ -29,7 +29,7 @@ jobs:
           - { label: ubuntu-latest }
         compiler:
           - { name: GNU, CC: gcc, CXX: g++, packages: gcc g++ }
-          - { name: LLVM, CC: clang, CXX: clang++, packages: clang libomp-dev llvm-dev libc++-dev libc++abi1 lld clang-tools }
+          - { name: LLVM, CC: clang, CXX: clang++, packages: clang llvm-dev }
         build_type:
           - Release
         generator: