[11.x] Allow setting exit code in migrate:status --pending

[brecht-vermeersch]

When we deploy our Laravel application with docker, we first launch a job that does the following:

php artisan down
php artisan migrate
php artisan up

We use the down command with the cache driver to bring down the other containers (workers, schedulers, ...)

The issue with this setup is that we run the down command even if there are no pending migrations.

With this PR the following is possible

php artisan migrate:status --pending=100

exit_code=$?

if [ $exit_code -eq 100 ]; then
    # this code is skipped when there are no pending migrations
    php artisan down
    php artisan migrate
    php artisan up
fi

Syntax for the command option is inspired by the artisan migrate --isolate

[bert-w]

It's weird how the --pending boolean option accepts exitcodes tbh.

[NickSdot]

I tried to get in the same feature last year.

Taylor, please re-consider to accept something like this.