Adyen Payment 4.0.0

What's Changed

Breaking Changes 🛠

• Support Shopware 6.6 by @candemiralp in #474

New Features 💎

• [ECP-9087] Make HMAC validation optional by @candemiralp in #475

Fixes ⛑️

• [ECP-9027] Use autowire on service definitions by @candemiralp in #471
• [ECP-9198] Update duplicated CSS classes in the components by @candemiralp in #494

Other Changes 🖇️

• [ECP-9149] Remove deprecated classes of Shopware by @candemiralp in #495
• [ECP-9049] Fix fetching redeemed gift cards on cart load by @candemiralp in #496
• [ECP-8954] Automate the Shopware Marketplace zip file creation as release asset by @SushmitaThakur in #501
• Prepare V4 and remote track develop-4 into develop by @candemiralp in #493
• Release v4.0.0-rc1 by @candemiralp in #502
• [ECP-9226] Update syntax for default value in alter table in migration by @SushmitaThakur in #505
• [ECP-9206] Adyen related tables missing for giftcard payments on admin panel by @SushmitaThakur in #504
• [ECP-9250-v4] Support new Ideal payment flow by @candemiralp in #513
• [ECP-9206] Fix return type in checking adyen orders by @SushmitaThakur in #518

Additiona instructions for new iDeal implementation:
In TEST environment, if you already have iDEAL added as a payment method, you are probably using the acquirer account iDealSim. This is the simulator for the old flow and will break with this new feature.

Solution: add iDEAL in Customer Area again and make sure the acquirer account added this time is AdyenIdeal. This is the acquirer account for the new flow.

Note: in LIVE, the change to the new flow works ootb, no change in payment method setup in Customer Area required.

Current checkout api version: v71
Current checkout component version: v5.66.1

Full Changelog: 3.15.0...4.0.0