SQL Server functional tests take twice as long after recent Arcade update

Likely cause: external perf regression somewhere in .NET 9.0 Preview 5.

```
git checkout 9e6e342126d2831fd8a1aa2035e4b6d025a6447e <- Update dependencies from dotnet/arcade #34006
./test
Build succeeded in 738.3s

git checkout 33d7699b2e55d65dd50026fa6969219cdb3cd2cd
./test
Build succeeded in 325.6s
```