Refactor payments module to apply plugin mechanism consistently #14844

Job	Run time
Run the Django test suite	8m 47s
Run the Django test suite in reverse	5m 32s
Set up docker build 'dynamic' env variables	1s
Build and check documentation	4m 22s
End-to-end tests, chromium	14m 4s
End-to-end tests, firefox	17m 51s
End-to-end tests, webkit	12m 44s
docker_build (extensions, token_exchange,prefill_haalcentraalhr, all-extensions-) / Build image	2m 45s
docker_build (production) / Build image	2m 41s
Scan docker image	2m 6s
Simulate upgrading instances (2.7.4)	1m 20s
Simulate upgrading instances (2.7.8)	1m 18s
Check for unexepected OAS changes	4s
Generate Postman collection from OAS	13s
Validate OAS	13s
Generate SDKs from OAS	31s
Push Docker image	0s
update-docker-readme	0s
	1h 14m 32s

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