Add support for params between Step and StepActions

Following the previous [PR](tektoncd#7317), which introduced Params to the `StepAction` CRD,
this PR integrates `param` usage between `Steps` and `StepActions`. This
completes support for params in `StepActions`. This work is part of
issue tektoncd#7259.

examples/v1/pipelineruns/alpha/stepaction-params.yaml

@@ -0,0 +1,67 @@
+apiVersion: tekton.dev/v1alpha1
+kind: StepAction
+metadata:
+  name: step-action
+spec:
+  params:
+    - name: string-param
+      default: "a string param"
+    - name: array-param
+      type: array
+      default:
+        - an
+        - array
+        - param
+    - name: object-param
+      type: object
+      properties:
+        key1:
+          type: string
+        key2:
+          type: string
+        key3:
+          type: string
+      default:
+        key1: "step-action default key1"
+        key2: "step-action default key2"
+        key3: "step-action default key3"
+  image: bash:3.2
+  args: [
+    "echo",
+    "$(params.array-param[*])",
+    "$(params.string-param)",
+    "$(params.object-param.key1)",
+    "$(params.object-param.key2)"
+  ]
+---
+apiVersion: tekton.dev/v1
+kind: PipelineRun
+metadata:
+  name: step-action-pipeline-run-propagated
+spec:
+  params:
+    - name: stringparam
+      value: "pipelinerun stringparam"
+    - name: arrayparam
+      value:
+        - "pipelinerun"
+        - "array"
+        - "param"
+    - name: objectparam
+      value:
+        key2: "pipelinerun key2"
+  PipelineSpec:
+    tasks:
+      - name: run-action
+        taskSpec:
+          steps:
+          - name: action-runner
+            ref:
+              name: step-action
+            params:
+              - name: string-param
+                value: $(params.stringparam)
+              - name: array-param
+                value: $(params.arrayparam[*])
+              - name: object-param
+                value: $(params.objectparam[*])

examples/v1/taskruns/alpha/stepaction-params.yaml

@@ -0,0 +1,75 @@
+apiVersion: tekton.dev/v1alpha1
+kind: StepAction
+metadata:
+  name: step-action
+spec:
+  params:
+    - name: string-param
+      default: "a string param"
+    - name: array-param
+      type: array
+      default:
+        - an
+        - array
+        - param
+    - name: object-param
+      type: object
+      properties:
+        key1:
+          type: string
+        key2:
+          type: string
+        key3:
+          type: string
+      default:
+        key1: "step-action default key1"
+        key2: "step-action default key2"
+        key3: "step-action default key3"
+  image: bash:3.2
+  args: [
+    "echo",
+    "$(params.array-param[*])",
+    "$(params.string-param)",
+    "$(params.object-param.key1)",
+    "$(params.object-param.key2)",
+    "$(params.object-param.key3)"
+  ]
+---
+apiVersion: tekton.dev/v1
+kind: TaskRun
+metadata:
+  name: step-action-run
+spec:
+  params:
+    - name: stringparam
+      value: "taskrun stringparam"
+    - name: arrayparam
+      value:
+        - "taskrun"
+        - "array"
+        - "param"
+    - name: objectparam
+      value:
+        key2: "taksrun key2"
+  TaskSpec:
+    params:
+      - name: objectparam
+        properties:
+          key1:
+            type: string
+          key2:
+            type: string
+        default:
+          key1: "taskspec default key1"
+          key2: "taskspec default key2"
+    steps:
+      - name: action-runner
+        ref:
+          name: step-action
+        params:
+          - name: string-param
+            value: $(params.stringparam)
+          - name: array-param
+            value: $(params.arrayparam[*])
+          - name: object-param
+            value: $(params.objectparam[*])

pkg/reconciler/pipelinerun/resources/apply.go

@@ -367,9 +367,9 @@ func propagateParams(t v1.PipelineTask, stringReplacements map[string]string, ar
 				}
 			}
 		}
-		t.TaskSpec.TaskSpec = *resources.ApplyReplacements(&t.TaskSpec.TaskSpec, stringReplacementsDup, arrayReplacementsDup)
+		t.TaskSpec.TaskSpec = *resources.ApplyReplacements(&t.TaskSpec.TaskSpec, stringReplacementsDup, arrayReplacementsDup, objectReplacementsDup)
 	} else {
-		t.TaskSpec.TaskSpec = *resources.ApplyReplacements(&t.TaskSpec.TaskSpec, stringReplacements, arrayReplacements)
+		t.TaskSpec.TaskSpec = *resources.ApplyReplacements(&t.TaskSpec.TaskSpec, stringReplacements, arrayReplacements, objectReplacements)
 	}
 	return t
 }
@@ -395,7 +395,7 @@ func PropagateResults(rpt *ResolvedPipelineTask, runStates PipelineRunState) {
 			}
 		}
 	}
-	rpt.ResolvedTask.TaskSpec = resources.ApplyReplacements(rpt.ResolvedTask.TaskSpec, stringReplacements, arrayReplacements)
+	rpt.ResolvedTask.TaskSpec = resources.ApplyReplacements(rpt.ResolvedTask.TaskSpec, stringReplacements, arrayReplacements, map[string]map[string]string{})
 }
 
 // ApplyTaskResultsToPipelineResults applies the results of completed TasksRuns and Runs to a Pipeline's