Don't hardcode password flag in non-interactive error

Address review feedback: different commands use different password
flags (--password-file, --provisioner-password-file, --admin-password-file,
etc.), so don't suggest a specific flag. Instead, guide users to check
--help for the correct flag for their command.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: tashian

internal/cmd/root.go

@@ -98,13 +98,17 @@ func newApp(stdout, stderr io.Writer) *cli.App {
 	pemutil.WriteFile = fileutil.WriteFile
 	pemutil.PromptPassword = func(msg string) ([]byte, error) {
 		if !ui.CanPrompt() {
-			return nil, errs.NewRequiredInputError("password", "password-file")
+			// Don't suggest a specific flag since different commands use different
+			// password flags (--password-file, --provisioner-password-file, etc.)
+			return nil, errs.NewRequiredInputError("password", "")
 		}
 		return ui.PromptPassword(msg)
 	}
 	jose.PromptPassword = func(msg string) ([]byte, error) {
 		if !ui.CanPrompt() {
-			return nil, errs.NewRequiredInputError("password", "password-file")
+			// Don't suggest a specific flag since different commands use different
+			// password flags (--password-file, --provisioner-password-file, etc.)
+			return nil, errs.NewRequiredInputError("password", "")
 		}
 		return ui.PromptPassword(msg)
 	}