C#: Add workflow for running QL tests

csharp/scripts/create-extractor-pack.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+set -eux
+
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+  platform="linux64"
+  dotnet_platform="linux-x64"
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+  platform="osx64"
+  dotnet_platform="osx-x64"
+else
+  echo "Unknown OS"
+  exit 1
+fi
+
+rm -rf extractor-pack
+mkdir -p extractor-pack
+mkdir -p extractor-pack/tools/${platform}
+
+function dotnet_publish {
+  dotnet publish --self-contained --configuration Release --runtime ${dotnet_platform} -p:RuntimeFrameworkVersion=6.0.4 $1 --output extractor-pack/tools/${platform}
+}
+
+dotnet_publish extractor/Semmle.Extraction.CSharp.Standalone
+dotnet_publish extractor/Semmle.Extraction.CSharp.Driver
+dotnet_publish autobuilder/Semmle.Autobuild.CSharp
+
+cp -r codeql-extractor.yml tools/* downgrades tools ql/lib/semmlecode.csharp.dbscheme ql/lib/semmlecode.csharp.dbscheme.stats extractor-pack/