Add experimental kradalby gh runner

Remove old v2 runner in favour of self-hosted

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

.github/workflows/test-integration-v2-kradalby.yml

@@ -0,0 +1,27 @@
+name: Integration Test v2 - kradalby
+
+on: [pull_request]
+
+jobs:
+  integration-test-v2-kradalby:
+    runs-on: [self-hosted, linux, x64, nixos, docker]
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 2
+
+      # - name: Get changed files
+      #   id: changed-files
+      #   uses: tj-actions/changed-files@v14.1
+      #   with:
+      #     files: |
+      #       *.nix
+      #       go.*
+      #       **/*.go
+      #       integration_test/
+      #       config-example.yaml
+
+      - name: Run general integration tests
+        # if: steps.changed-files.outputs.any_changed == 'true'
+        run: nix develop --command -- make test_integration_v2_general