fix: allow mapping into env variable INPUT_N from ${{ inputs.n }} (#1080)

When using a reusable workflow such as:
```yaml
name: "use-inputs-impl"

on:
  workflow_call:
    inputs:
      image:
        description: "Image to be used in job"
        type: string
        required: false
        default: "docker.io/alpine:3.22"
      condition:
        description: "Only run a job if this is true"
        type: string
        required: false
        default: false

jobs:
  works:
    runs-on: docker
    container:
      image: alpine:3.22
    env:
      INPUT_IMAGE: ${{ inputs.image }}
      INPUT_CONDITION: ${{ inputs.condition }}
    steps:
      - run: echo "Hello world from Alpine"
      - run: cat /etc/alpine-release
      - run: echo "INPUT_IMAGE=$INPUT_IMAGE"
      - run: echo "INPUT_CONDITION=$INPUT_CONDITION"
```

The runner will currently output un-evaluated expressions:
```
INPUT_IMAGE=${{ inputs.image }}
INPUT_CONDITION=${{ inputs.condition }}
```

Internally, the workflow is using `INPUT_...` environment variables to transfer data into local reusable workflows, and the order of evaluation in `getEvaluatorInputs` was preferring to use the un-evaluated value, over the evaluated value.

<!--start release-notes-assistant-->
<!--URL:https://code.forgejo.org/forgejo/runner-->
- bug fixes
  - [PR](https://code.forgejo.org/forgejo/runner/pulls/1080): <!--number 1080 --><!--line 0 --><!--description Zml4OiBhbGxvdyBtYXBwaW5nIGludG8gZW52IHZhcmlhYmxlIElOUFVUX04gZnJvbSAke3sgaW5wdXRzLm4gfX0=-->fix: allow mapping into env variable INPUT_N from ${{ inputs.n }}<!--description-->
<!--end release-notes-assistant-->

Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/1080
Reviewed-by: earl-warren <earl-warren@noreply.code.forgejo.org>
Co-authored-by: Mathieu Fenniak <mathieu@fenniak.net>
Co-committed-by: Mathieu Fenniak <mathieu@fenniak.net>

act/runner/expression.go

@@ -479,8 +479,6 @@ func rewriteSubExpression(ctx context.Context, in string, forceFormat bool) (str
 func getEvaluatorInputs(ctx context.Context, rc *RunContext, step step, ghc *model.GithubContext) map[string]any {
 	inputs := map[string]any{}
 
-	setupWorkflowInputs(ctx, &inputs, rc)
-
 	var env map[string]string
 	if step != nil {
 		env = *step.getEnv()
@@ -494,6 +492,8 @@ func getEvaluatorInputs(ctx context.Context, rc *RunContext, step step, ghc *mod
 		}
 	}
 
+	setupWorkflowInputs(ctx, &inputs, rc)
+
 	if rc.caller == nil && ghc.EventName == "workflow_dispatch" {
 		config := rc.Run.Workflow.WorkflowDispatchConfig()
 		if config != nil && config.Inputs != nil {

act/runner/runner_test.go

@@ -263,6 +263,7 @@ func TestRunner_RunEvent(t *testing.T) {
 		{workdir, "uses-workflow", "pull_request", "", platforms, map[string]string{"secret": "keep_it_private"}},
 		{workdir, "uses-docker-url", "push", "", platforms, secrets},
 		{workdir, "act-composite-env-test", "push", "", platforms, secrets},
+		{workdir, "uses-workflow-env-input", "push", "", platforms, secrets},
 
 		// Eval
 		{workdir, "evalmatrix", "push", "", platforms, secrets},

act/runner/testdata/.github/workflows/local-reusable-env-input.yml

@@ -0,0 +1,21 @@
+name: "use-inputs-impl"
+
+on:
+  workflow_call:
+    inputs:
+      greet_target:
+        type: string
+        required: false
+        default: "Some Default Value"
+
+jobs:
+  works:
+    runs-on: ubuntu-latest
+    env:
+      MY_INPUT_TEST: ${{ inputs.greet_target }}
+      INPUT_TEST: ${{ inputs.greet_target }}
+      INPUT_GREET_TARGET: ${{ inputs.greet_target }}
+    steps:
+      - run: '[ "$MY_INPUT_TEST" = "Mona the Octocat" ] || exit 1'
+      - run: '[ "$INPUT_TEST" = "Mona the Octocat" ] || exit 1'
+      - run: '[ "$INPUT_GREET_TARGET" = "Mona the Octocat" ] || exit 1'

act/runner/testdata/uses-workflow-env-input/push.yml

@@ -0,0 +1,8 @@
+name: local-action-env-input
+on: push
+jobs:
+  test:
+    runs-on: docker
+    uses: ./testdata/.github/workflows/local-reusable-env-input.yml
+    with:
+      greet_target: 'Mona the Octocat'