intl_migration: codemod can produce duplicate message names for similar strings

[alanknight-wk]

e.g.

static String get remove => Intl.message(
        'Remove',
        name: 'FooAppIntl_remove',
      );
  static String get remove => Intl.message(
        'remove',
        name: 'FooAppIntl_remove',
      );