Inline the test pipeline.

.lighthouse/pipeline-rust-test.yaml

@@ -81,9 +81,34 @@ spec:
             workspace: docker-credentials
         runAfter:
           - fetch-repository
-      - name: run-image
-        taskRef:
-          name: run-docker-image
+      - name: run-cargo-test
+        taskSpec:
+          metadata: {}
+          params:
+            - name: docker-image
+              type: string
+              description: Docker image to run.
+              default: alpine:3.18
+          stepTemplate:
+            image: alpine:3.18
+            name: ""
+            resources:
+              requests:
+                cpu: 10m
+                memory: 600Mi
+            workingDir: /workspace/source
+          workspaces:
+            - name: source
+              mountPath: /source
+            - name: cargo-cache
+              mountPath: /usr/local/cargo/registry
+              optional: true
+          steps:
+            - name: run
+              image: $(params.docker-image)
+              workingDir: "$(workspaces.source.path)"
+              command: [cargo, test, --no-fail-fast]
+              args: []
         workspaces:
           - name: source
             workspace: git-source
@@ -92,8 +117,6 @@ spec:
         runAfter:
           - build-image
         params:
-          - name: command
-            value: [cargo, test, --no-fail-fast]
           - name: docker-image
             value: "$(params.image-name):$(tasks.fetch-repository.results.commit)"
     finally: