ci(test): load MsQuic for Linux tests [CI]

ci/verify-backend.sh

@@ -66,6 +66,9 @@ fi
 
 # 测试在缓存目录里跑完整的解决方案（不再重复编译）
 log="$cache/last-test.log"
+quic_runtime="$cache/quic-runtime"
+bash "$root/ci/fetch-quic-test-runtime.sh" "$quic_runtime"
+export LD_LIBRARY_PATH="$quic_runtime/runtime${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
 status=0
 # 别的程序集里没有匹配的测试会因为「零个测试」返回 8，忽略它
 (cd "$src/backend" && dotnet test --solution MoShiro.slnx -c Release --no-build "${filter[@]}" --ignore-exit-code 8) 2>&1 | tee "$log" || status=${PIPESTATUS[0]}