Remove possibility to add Stripe as a payment method when package is missing

[jakubtobiasz]

Q	A
Branch?	1.12
Bug fix?	yes
New feature?	no
BC breaks?	no
Deprecations?	no
Related tickets	closes #10655
License	MIT

I've added a compiler pass to PayumBundle to remove Stripe's Type when stripe/stripe-php package is not present. I had no idea how to test it, and I've noticed the other passes are not tested either. The logic is simple, so I decided it is not such a big deal to left it as is.

[GSadee]

Thank you, Jakub! 🥇

[Prometee]

@jakubtobiasz I'm afraid this compiler pass is not checking the right thing. It did not work because the if statement is testing for the existence of a stripe/stripe-php class instead of the payum/stripe Stripe Checkout's Payum gateway factory.

The reason for that, is because the Stripe Checkout's Payum gateway factory is inside payum/stripe which was previously required by payum/payum. When payum/payum was replaced by payum/core the Stripe Checkout's Payum gateway factory was removed in the same time, letting the php library stripe/stripe-php alone in the dark.

What can be done is to replace the dev requirement of stripe/stripe-php by payum/stripe, same for sylius/sylius-standard and finally fix the UnregisterStripeGatewayTypePass by replacing the if statement with this :

        if (class_exists(StripeCheckoutGatewayFactory::class)) {
            return;
        }