Refactor payments module to apply plugin mechanism consistently #14842

Job	Run time
Set up docker build 'dynamic' env variables	1s
End-to-end tests, chromium	13m 33s
Build and check documentation	3m 6s
End-to-end tests, firefox	16m 33s
End-to-end tests, webkit	12m 3s
Run the Django test suite	8m 3s
Run the Django test suite in reverse	5m 37s
docker_build (extensions, token_exchange,prefill_haalcentraalhr, all-extensions-) / Build image	2m 44s
docker_build (production) / Build image	2m 51s
Simulate upgrading instances (2.7.4)	1m 39s
Simulate upgrading instances (2.7.8)	1m 26s
Scan docker image	2m 7s
Check for unexepected OAS changes	5s
Generate SDKs from OAS	31s
Generate Postman collection from OAS	18s
Validate OAS	16s
Push Docker image	0s
update-docker-readme	0s
	1h 10m 53s

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