Split kind tests into component-owned probes

tests/kind/matrix-run.sh

@@ -7,6 +7,7 @@ source "$ROOT/tests/kind/lib.sh"
 USER_KUBECONFIG_BEFORE="$(user_kubeconfig_digest)"
 SUCCEEDED=false
 OWNS_FIXTURE=false
+TEST_IMAGE=nuthatch-fixture-probe:local
 
 cleanup() {
   local status=$?
@@ -34,10 +35,16 @@ acquire_fixture_lock
 OWNS_FIXTURE=true
 setup_fixture all
 source "$RUNTIME/fixture.env"
+"$NUTHATCH_REAL_NERDCTL" --namespace "$NERDCTL_NAMESPACE" build \
+  --file "$ROOT/Dockerfile" \
+  --target test-runtime \
+  --tag "$TEST_IMAGE" \
+  "$ROOT"
+load_local_image "$TEST_IMAGE" "$NERDCTL_NAMESPACE"
 run_job_matrix \
   fixture-matrix \
   "$TESTBED/matrix-job.yaml.in" \
-  "$CURL_LOCAL_IMAGE" \
+  "$TEST_IMAGE" \
   all
 SUCCEEDED=true
 printf 'Nuthatch fixture matrix passed\n'