fix: add glibc for az-copy on alpine

Signed-off-by: Henrik Gerdes <hegerdes@outlook.de>

.gitlab/ci/snippets.yml

@@ -291,6 +291,9 @@
         if [ "$(uname -m)" = "aarch64" ]; then
           ARCH="-arm64"
         fi
+        if command -v apk > /dev/null; then
+          apk add --no-cache libc6-compat > /dev/null
+        fi
         curl -sL https://aka.ms/downloadazcopy-v10-linux${ARCH} -o az-copy.tar
         tar -xf az-copy.tar --strip-components=1 -C /usr/local/bin/
       fi