ci(amd64/gcc/unit_tests): replace conan commands with cmake

tools/ci/amd64/gcc/unit_tests.sh

@@ -5,25 +5,18 @@ cd $(git rev-parse --show-toplevel)/
 rm -rf ./build
 
 Xvfb :99 -screen 0 1024x768x16 &
-export DISPLAY=:99
 export CXX=$(which g++)
 export CC=$(which gcc)
+export DISPLAY=:99
 
-conan build . \
-    -c tools.system.package_manager:mode=install \
-    -c tools.cmake.cmaketoolchain:generator=Ninja \
-    -c tools.build:compiler_executables='{"c": "gcc", "cpp": "g++"}' \
-    -s build_type=Release \
-    -s compiler=gcc \
-    -s compiler.version=15 \
-    -s compiler.libcxx=libstdc++ \
-    -o enable_unit_tests=True \
-    -o enable_fuzz_tests=False \
-    -o enable_llvm_coverage=False \
-    -o enable_static_analysis=False \
-    -o use_mold=True \
-    -o export_compile_commands=False \
-    --build=missing
+cmake .. \
+-G Ninja \
+-DCMAKE_LINKER_TYPE=MOLD \
+-DENABLE_UNIT_TESTS=ON \
+-DENABLE_LLVM_COVERAGE=ON \
+-DCMAKE_BUILD_TYPE=Release \
+-DCMAKE_CXX_FLAGS="-std=c++23 -stdlib=libstdc++ -g -fno-omit-frame-pointer" \
+&& cmake --build . -j `nproc`
 
 for test in $(find ./build -type f -name '*_tests' -executable); do
   echo "Running $test"