Remove dependency on run-docker-image task.

.lighthouse/pipeline-rust-test.yaml

@@ -99,18 +99,23 @@ spec:
         runAfter:
           - fetch-repository
       - name: run-image
-        taskRef:
-          name: run-docker-image
+        taskSpec:
+          metadata: {}
+          stepTemplate:
+            name: ""
+            workingDir: "$(workspaces.source.path)"
           workspaces:
             - name: source
-            workspace: git-source
+              mountPath: /source
             - name: cargo-cache
-            workspace: cargo-cache
-        runAfter:
-          - build-image
-        params:
-          - name: args
-            value:
+              mountPath: /usr/local/cargo/registry
+              optional: true
+          steps:
+            - name: run
+              image: "$(params.image-name):$(tasks.fetch-repository.results.commit)"
+              workingDir: "$(workspaces.source.path)"
+              command: []
+              args:
                 [
                   --no-default-features,
                   --features,
@@ -120,8 +125,13 @@ spec:
                   --test,
                   test_loader,
                 ]
-          - name: docker-image
-            value: "$(params.image-name):$(tasks.fetch-repository.results.commit)"
+        workspaces:
+          - name: source
+            workspace: git-source
+          - name: cargo-cache
+            workspace: cargo-cache
+        runAfter:
+          - build-image
     finally:
       - name: report-success
         when: