Align step failure log output with GitHub Actions (#927)

Fixes #926.

Before:

<img src="/attachments/a5ae9221-eee2-410a-964e-6103ce126df4" alt="image.png" width="400">

After:

<img width="400" alt="image.png" src="attachments/2f2d67c4-6080-4ec3-9ae5-df33e6479920">

Also gets rid of a bunch of emojis in the logging and the obsolete link to `nektos/act` and align some other error messages.

---
This PR was written with the help of Claude Opus 4.7

---------

Co-authored-by: Nicolas <bircni@icloud.com>
Reviewed-on: https://gitea.com/gitea/runner/pulls/927
Reviewed-by: Nicolas <bircni@icloud.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-committed-by: silverwind <me@silverwind.io>

act/container/docker_run_test.go

@@ -23,6 +23,7 @@ import (
 	"github.com/sirupsen/logrus/hooks/test"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
 )
 
 func TestDocker(t *testing.T) {
@@ -85,6 +86,11 @@ func (m *mockDockerClient) ContainerExecInspect(ctx context.Context, execID stri
 	return args.Get(0).(types.ContainerExecInspect), args.Error(1)
 }
 
+func (m *mockDockerClient) ContainerWait(ctx context.Context, containerID string, condition container.WaitCondition) (<-chan container.WaitResponse, <-chan error) {
+	args := m.Called(ctx, containerID, condition)
+	return args.Get(0).(<-chan container.WaitResponse), args.Get(1).(<-chan error)
+}
+
 func (m *mockDockerClient) CopyToContainer(ctx context.Context, id, path string, content io.Reader, options types.CopyToContainerOptions) error {
 	args := m.Called(ctx, id, path, content, options)
 	return args.Error(0)
@@ -174,12 +180,43 @@ func TestDockerExecFailure(t *testing.T) {
 	}
 
 	err := cr.exec([]string{""}, map[string]string{}, "user", "workdir")(ctx)
-	assert.Error(t, err, "exit with `FAILURE`: 1") //nolint:testifylint // pre-existing issue from nektos/act
+	var exitErr ExitCodeError
+	require.ErrorAs(t, err, &exitErr)
+	assert.Equal(t, ExitCodeError(1), exitErr)
+	assert.Equal(t, "Process completed with exit code 1.", err.Error())
 
 	conn.AssertExpectations(t)
 	client.AssertExpectations(t)
 }
 
+func TestDockerWaitFailure(t *testing.T) {
+	ctx := context.Background()
+
+	statusCh := make(chan container.WaitResponse, 1)
+	statusCh <- container.WaitResponse{StatusCode: 2}
+	errCh := make(chan error, 1)
+
+	client := &mockDockerClient{}
+	client.On("ContainerWait", ctx, "123", container.WaitConditionNotRunning).
+		Return((<-chan container.WaitResponse)(statusCh), (<-chan error)(errCh))
+
+	cr := &containerReference{
+		id:  "123",
+		cli: client,
+		input: &NewContainerInput{
+			Image: "image",
+		},
+	}
+
+	err := cr.wait()(ctx)
+	var exitErr ExitCodeError
+	require.ErrorAs(t, err, &exitErr)
+	assert.Equal(t, ExitCodeError(2), exitErr)
+	assert.Equal(t, "Process completed with exit code 2.", err.Error())
+
+	client.AssertExpectations(t)
+}
+
 func TestDockerCopyTarStream(t *testing.T) {
 	ctx := context.Background()