ci: print k3s logs on failure

The `E2E Tests (test-executor, v1.28.13+k3s1, minimal, false)` test has
been flaky for awhile and keeps failing with the error
`ErrImageNeverPull: Container image "quay.io/argoproj/argocli:latest" is
not present with pull policy of Never.

This shouldn't be happening because k3s should be using cri-dockerd as
the container runtime and the "Load images" step handles loading that
image into Docker. There were changes to cri-dockerd recently
(Mirantis/cri-dockerd#373) that might be
related, but it's impossible to tell without the logs.

Signed-off-by: Mason Malone <[email protected]>

.github/workflows/ci-build.yaml

@@ -313,6 +313,9 @@ jobs:
         run: make ${{matrix.test}} E2E_SUITE_TIMEOUT=20m STATIC_FILES=false
 
       # failure debugging below
+      - name: Failure debug - k3s logs
+        if: ${{ failure() }}
+        run: journalctl -u k3s
       - name: Failure debug - describe MinIO/MySQL deployment
         if: ${{ failure() }}
         run: |