lint: fix errorsastype: errors.As can be simplified using AsType[...]

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

pkg/downloader/downloader.go

@@ -786,8 +786,7 @@ func decompressLocal(ctx context.Context, decompressCmd, dst, src, ext, descript
 	cmd.Stderr = buf
 	err = cmd.Run()
 	if err != nil {
-		var exitErr *exec.ExitError
-		if errors.As(err, &exitErr) {
+		if exitErr, ok := errors.AsType[*exec.ExitError](err); ok {
 			exitErr.Stderr = buf.Bytes()
 		}
 	}

pkg/hostagent/api/client/client.go

@@ -82,8 +82,7 @@ func (c *client) Screenshot(ctx context.Context, format string) ([]byte, error)
 	u := fmt.Sprintf("http://%s/%s/screenshot?%s", c.dummyHost, c.version, params.Encode())
 	resp, err := httpclientutil.Get(ctx, c.HTTPClient(), u)
 	if err != nil {
-		var httpErr *httpclientutil.HTTPStatusError
-		if errors.As(err, &httpErr) {
+		if httpErr, ok := errors.AsType[*httpclientutil.HTTPStatusError](err); ok {
 			switch httpErr.StatusCode {
 			case http.StatusNotFound:
 				return nil, errors.New("hostagent does not support screenshot — restart the instance to pick up the latest hostagent binary")

pkg/limatmpl/locator.go

@@ -376,8 +376,7 @@ func transformCustomURL(ctx context.Context, locator string) (string, error) {
 
 	stdout, err := cmd.Output()
 	if err != nil {
-		var exitErr *exec.ExitError
-		if errors.As(err, &exitErr) {
+		if exitErr, ok := errors.AsType[*exec.ExitError](err); ok {
 			stderrMsg := string(exitErr.Stderr)
 			if stderrMsg != "" {
 				return "", fmt.Errorf("command %#q failed: %s", cmd.String(), strings.TrimSpace(stderrMsg))

pkg/networks/reconcile/reconcile.go

@@ -305,12 +305,10 @@ func startDaemonWithRetry(ctx context.Context, cfg *networks.Config, name, daemo
 		}
 		// Only an early exit (the transient XPC race) is retried; everything else
 		// is surfaced immediately.
-		var exited *daemonExitedError
-		if !errors.As(err, &exited) {
+		if _, ok := errors.AsType[*daemonExitedError](err); !ok {
 			// A stuck (still-running) daemon gets its stderr appended; PID-read and
 			// context errors propagate as-is.
-			var stuck *daemonStuckError
-			if errors.As(err, &stuck) {
+			if _, ok := errors.AsType[*daemonStuckError](err); ok {
 				return fmt.Errorf("%s daemon for %#q network %w%s", daemon, name, err, stderrHint(stderrLog))
 			}
 			return err