Cosign improvements - batch 1 #14389

Job	Run time
Build and check documentation	3m 45s
End-to-end tests, chromium	13m 53s
End-to-end tests, firefox	17m 1s
End-to-end tests, webkit	12m 45s
Run the Django test suite	8m 10s
Run the Django test suite in reverse	5m 14s
Set up docker build 'dynamic' env variables	1s
docker_build (extensions, token_exchange,prefill_haalcentraalhr, all-extensions-) / Build image	2m 41s
docker_build (production) / Build image	2m 43s
Scan docker image	2m 7s
Simulate upgrading instances (2.7.4)	1m 18s
Simulate upgrading instances (2.7.8)	1m 17s
Check for unexepected OAS changes	0s
Validate OAS	0s
Generate Postman collection from OAS	0s
Generate SDKs from OAS	0s
Push Docker image	0s
update-docker-readme	0s
	1h 10m 55s

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