Add Checkout utility factory into Helper\Data

Add live endpoint prefix to initialize client

- Card components instead of CSE
- 3D secure adjusted
- Installments adjusted

- Dependent php-api-library change (on the branch PW-306)

password
- Remove username, password (test, live) from admin/store configuration/
required settings. Add API Key instead
- Get secure fields SDK based on isDemo
- Include checkout js components
- Remove CSE library and tokens

PW-882: Fix 3dsecure for M2.3, fix captureonshipment

Set isajax to true in Validate3d controller to prevent Invalid form key error(magento 2.3), fix for capture on shipment method

autofix code style + two fixed errors setting the right exception cla…

* PW-818: Fix for Magento 2.3 compatibility

* Set only the isAjax param instead of setting everything again

FIX enable advanced cc for store level
PW-858

PW-835 Move from details.shtml to skipDetails.shtml

Move minimum version to 1.5.3 so we are able to track the integration

/details.shtml

#353 Remove liveEndpointPrefix while not moving to checkoutAPI

Resolve PR comments

 - Pass api key to initializeClient function isntead of setting the key
directly

Disabling POS Cloud for backend orders

PW-560: Merge Cloud API branch

Accepting notifications for multiple merchant accounts

Resolve comments during code review

* removed customerCollectionFactory

* do not expose storemanager, storeid mandatory for getAdyenMerchantAccount

* phpdoc fix

Re-merging "PW-615"