fix: only fail announcing phase in the end (#3666)

This prevents one announce failure to skip all other announcers.

The release will still report a failure in the end, but will not fail in
the first failure.

Also improved errors messages a little bit.

closes #3663

Signed-off-by: Carlos A Becker <caarlos0@users.noreply.github.com>

internal/middleware/errhandler/error_test.go

@@ -1,11 +1,13 @@
 package errhandler
 
 import (
+	"errors"
 	"fmt"
 	"testing"
 
 	"github.com/goreleaser/goreleaser/internal/pipe"
 	"github.com/goreleaser/goreleaser/pkg/context"
+	"github.com/hashicorp/go-multierror"
 	"github.com/stretchr/testify/require"
 )
 
@@ -28,3 +30,29 @@ func TestError(t *testing.T) {
 		})(nil))
 	})
 }
+
+func TestErrorMemo(t *testing.T) {
+	memo := Memo{}
+	t.Run("no errors", func(t *testing.T) {
+		require.NoError(t, memo.Wrap(func(ctx *context.Context) error {
+			return nil
+		})(nil))
+	})
+
+	t.Run("pipe skipped", func(t *testing.T) {
+		require.NoError(t, memo.Wrap(func(ctx *context.Context) error {
+			return pipe.ErrSkipValidateEnabled
+		})(nil))
+	})
+
+	t.Run("some err", func(t *testing.T) {
+		require.NoError(t, memo.Wrap(func(ctx *context.Context) error {
+			return fmt.Errorf("pipe errored")
+		})(nil))
+	})
+
+	err := memo.Error()
+	merr := &multierror.Error{}
+	require.True(t, errors.As(err, &merr), "must be a multierror")
+	require.Len(t, merr.Errors, 1)
+}