C#: Add autobuilder test with global.json

csharp/ql/integration-tests/all-platforms/autobuild/Files.expected

@@ -0,0 +1,3 @@
+| Program.cs:0:0:0:0 | Program.cs |
+| obj/Debug/net5.0/.NETCoreApp,Version=v5.0.AssemblyAttributes.cs:0:0:0:0 | obj/Debug/net5.0/.NETCoreApp,Version=v5.0.AssemblyAttributes.cs |
+| obj/Debug/net5.0/autobuild.AssemblyInfo.cs:0:0:0:0 | obj/Debug/net5.0/autobuild.AssemblyInfo.cs |

csharp/ql/integration-tests/all-platforms/autobuild/Files.ql

@@ -0,0 +1,5 @@
+import csharp
+
+from File f
+where f.fromSource()
+select f

csharp/ql/integration-tests/all-platforms/autobuild/Program.cs

@@ -0,0 +1 @@
+var dummy = "dummy";

csharp/ql/integration-tests/all-platforms/autobuild/autobuild.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+ <Target Name="DeleteBinObjFolders" BeforeTargets="Clean">
+   <RemoveDir Directories=".\bin" />
+   <RemoveDir Directories=".\obj" />
+ </Target>
+</Project>

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

@@ -0,0 +1,5 @@
+{
+    "sdk": {
+        "version": "5.0.408"
+    }
+}

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

@@ -0,0 +1,3 @@
+from create_database_utils import *
+
+run_codeql_database_create([], lang="csharp", extra_args=["--extractor-option=cil=false"])