git: Updated CI to latest available compilers and distros (#2003)

dist/macOS/arm64.Dockerfile

@@ -118,7 +118,7 @@ if [ "$CUSTOM_GLFW" ]; then
     cd /mnt/glfw
     mkdir build
     cd build
-    CC=o64-gcc CXX=o64-g++ cmake -G "Ninja"             \
+    CC=o64-clang CXX=o64-clang++ cmake -G "Ninja"       \
           -DCMAKE_BUILD_TYPE=$BUILD_TYPE                \
           -DBUILD_SHARED_LIBS=ON                        \
           -DCMAKE_C_COMPILER_LAUNCHER=ccache            \

dist/macOS/arm64.crosscompile.Dockerfile

@@ -68,19 +68,6 @@ RUN --mount=type=cache,target=/cache <<EOF
     
     ccache -s
 EOF
-# Not needed, because we don't use gcc for cross-compiling anymore
-# ## Install dependencies for gcc-13
-# RUN apt install -y gcc g++ zlib1g-dev libmpc-dev libmpfr-dev libgmp-dev
-# ## Build cross-compiler gcc-13
-# RUN --mount=type=cache,target=/cache <<EOF
-#     set -xe
-#     ccache -zs
-
-#     cd /osxcross
-#     UNATTENDED=1 CC=/usr/lib/ccache/gcc CXX=/usr/lib/ccache/g++ GCC_VERSION=13.2.0 ./build_gcc.sh
-
-#     ccache -s
-# EOF
 
 ARG DELETE_SDK=1
 RUN <<EOF