FIX Don't try to use option when it doesn't exist

[GuySartorelli]

When running this command:

MS_GITHUB_TOKEN=my_token php run.php labels --only=gha-add-pr-to-project

I got the following error:

The "unsupported-default-branch" option does not exist.

Issue

• Create a project board for tracking community PR review progress .github#155

[emteknetnz]

This doesn't seem right

We use if ($input->getOption('dry-run')) { in multiple places already without the use of hasOption()

In run.php both options are defined the same

$optionDryRun = [
    'dry-run',
    null,
    InputOption::VALUE_NONE,
    'Do not push to github or create pull-requests'
];
// ...
$optionUnsupported = [
    'unsupported-default-branch',
    null,
    InputOption::VALUE_NONE,
    'Only update unsupported modules th...'
];

Update: ignore me, just realised this is for the labels command