build: go 1.24

We were running behind and there were quite some deprecations to update.
This was mostly in the upstream copy/pasta package but seems quite
minimal.

vendor/github.com/docker/cli/cli-plugins/manager/cobra.go

@@ -52,7 +52,6 @@ func AddPluginCommandStubs(dockerCli command.Cli, rootCmd *cobra.Command) (err e
 			return
 		}
 		for _, p := range plugins {
-			p := p
 			vendor := p.Vendor
 			if vendor == "" {
 				vendor = "unknown"
@@ -82,7 +81,7 @@ func AddPluginCommandStubs(dockerCli command.Cli, rootCmd *cobra.Command) (err e
 						cmd.HelpFunc()(rootCmd, args)
 						return nil
 					}
-					return fmt.Errorf("docker: '%s' is not a docker command.\nSee 'docker --help'", cmd.Name())
+					return fmt.Errorf("docker: unknown command: docker %s\n\nRun 'docker --help' for more information", cmd.Name())
 				},
 				ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
 					// Delegate completion to plugin

vendor/github.com/docker/cli/cli-plugins/manager/manager.go

@@ -32,7 +32,7 @@ const (
 // errPluginNotFound is the error returned when a plugin could not be found.
 type errPluginNotFound string
 
-func (e errPluginNotFound) NotFound() {}
+func (errPluginNotFound) NotFound() {}
 
 func (e errPluginNotFound) Error() string {
 	return "Error: No such CLI plugin: " + string(e)