C#: Enable tests for all platforms and use .NET 10 instead of .NET 10 RC 2.

Author: michaelnebel

csharp/ql/integration-tests/all-platforms/dotnet_10/global.json

@@ -1,5 +1,5 @@
 {
     "sdk": {
-        "version": "10.0.100-rc.2.25502.107"
+        "version": "10.0.100"
     }
 }

csharp/ql/integration-tests/all-platforms/dotnet_10/test.py

@@ -1,6 +1,5 @@
 import os
 import runs_on
 
-@runs_on.windows
 def test(codeql, csharp):
     codeql.database.create()