[#3283] Remove oldstyle appointments flow #14652

Job	Run time
Set up docker build 'dynamic' env variables	1s
Build and check documentation	52s
End-to-end tests, chromium	2m 23s
Run the Django test suite	2m 44s
End-to-end tests, firefox	2m 40s
End-to-end tests, webkit	2m 42s
Run the Django test suite in reverse	3m 33s
docker_build (extensions, token_exchange,prefill_haalcentraalhr, all-extensions-) / Build image	1m 56s
docker_build (production) / Build image	1m 54s
Scan docker image	0s
Simulate upgrading instances	0s
Check for unexepected OAS changes	0s
Generate SDKs from OAS	0s
Validate OAS	0s
Generate Postman collection from OAS	0s
Push Docker image	0s
update-docker-readme	0s
	18m 45s

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