OIDC: Plugin-customizable OpenIDProvider class #3252

Job	Run time
Build frontend unit test image	1m 11s
Build frontend e2e test image	31s
Build backend e2e test image	34s
lint_core	2m 11s
Lint mwdb-core web sources	48s
Build mwdb-core web image	2m 5s
Perform frontend unit tests	36s
Build mwdb-core core image	1m 18s
Perform backend e2e tests	2m 45s
Perform frontend e2e tests	2m 56s
Push images on Docker Hub	0s
Push test images on Docker Hub	0s
	14m 55s

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