cli/command/plugins: use errors.Join instead of custom cli.Errors

This command was using a custom "multi-error" implementation, but it
had some limitations, and the formatting wasn't great.

This patch replaces it with Go's errors.Join.

Before:

    docker plugin remove one two three
    Error response from daemon: plugin "one" not found, Error response from daemon: plugin "two" not found, Error response from daemon: plugin "three" not found

After:

    docker plugin remove one two three
    Error response from daemon: plugin "one" not found
    Error response from daemon: plugin "two" not found
    Error response from daemon: plugin "three" not found

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

cli/command/plugin/remove.go

@@ -2,6 +2,7 @@ package plugin
 
 import (
 	"context"
+	"errors"
 	"fmt"
 
 	"github.com/docker/cli/cli"
@@ -36,17 +37,13 @@ func newRemoveCommand(dockerCli command.Cli) *cobra.Command {
 }
 
 func runRemove(ctx context.Context, dockerCli command.Cli, opts *rmOptions) error {
-	var errs cli.Errors
+	var errs error
 	for _, name := range opts.plugins {
 		if err := dockerCli.Client().PluginRemove(ctx, name, types.PluginRemoveOptions{Force: opts.force}); err != nil {
-			errs = append(errs, err)
+			errs = errors.Join(errs, err)
 			continue
 		}
-		fmt.Fprintln(dockerCli.Out(), name)
+		_, _ = fmt.Fprintln(dockerCli.Out(), name)
 	}
-	// Do not simplify to `return errs` because even if errs == nil, it is not a nil-error interface value.
-	if errs != nil {
-		return errs
-	}
-	return nil
+	return errs
 }