C#: Use autobuilder instead of supplying build command.

Author: michaelnebel

csharp/ql/integration-tests/all-platforms/dotnet_10_rc2/test.py

@@ -1,4 +1,4 @@
 import os
 
 def test(codeql, csharp):
-    codeql.database.create(command="dotnet build")
+    codeql.database.create()