[Release-1.28] Support PR testing installs (#9469)

* Upload sha256sum artifact for k3s binary during GH Actions build
* Trigger integration test on changes to build-k3s workflow

Signed-off-by: Derek Nola <derek.nola@suse.com>

.github/workflows/build-k3s.yaml

@@ -22,7 +22,7 @@ jobs:
     - name: Build K3s binary
       run: |
         DOCKER_BUILDKIT=1 SKIP_IMAGE=1 SKIP_AIRGAP=1 SKIP_VALIDATE=1 GOCOVER=1 make
-      
+        sha256sum dist/artifacts/k3s | sed 's|dist/artifacts/||' > dist/artifacts/k3s.sha256sum
     - name: bundle repo
       if: inputs.upload-repo == true
       run: |
@@ -39,4 +39,4 @@ jobs:
       uses: actions/upload-artifact@v3
       with:
         name: k3s
-        path: dist/artifacts/k3s
+        path: dist/artifacts/k3s*

.github/workflows/integration.yaml

@@ -19,6 +19,7 @@ on:
       - "!tests/e2e**"
       - ".github/**"
       - "!.github/workflows/integration.yaml"
+      - "!.github/workflows/build-k3s.yaml"
   workflow_dispatch: {}
 
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