Support for provider-neutral OIDC Dev UI

[sberyozkin]

Fixes #18427.

This PR simply makes Dev UI page which is currently only shown when Dev Services for Keycloak is started visible when quarkus.oidc.auth-server-url already points to a started Keycloak or indeed any other OpenId Connect provider which support the auto-discovery.

As far as the provider.html is concerned I just had to do a few ifs/elses as a provider like Auth0 does not return a logout URL, and also does not support returning the code as URL fragment, and do a few minor updates to avoid assuming that all provider URLs are Keycloak based.

Finally I had to move a few handlers to the quarkus.oidc.devservices package to reuse between Dev Services for Keycloak and generic OpenId Connect Dev Console - both are supported by the same provider.html.

Tested with Keycloak and Auth0.
In a follow up PR I'll do a bit more work to support more token grants with non-Keycloak providers.

[quarkus-bot]

This workflow status is outdated as a new workflow run has been triggered.

Failing Jobs - Building 79a43d7

Status	Name	Step	Failures	Logs	Raw logs
✖	JVM Tests - JDK 11	Build	Failures	Logs	Raw logs
✖	JVM Tests - JDK 11 Windows	Build	Failures	Logs	Raw logs
✖	JVM Tests - JDK 16	Build	Failures	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 11 #

- Failing: integration-tests/devmode 

📦 integration-tests/devmode

✖ io.quarkus.test.devconsole.DevConsoleOidcSmokeTest.testCaches line 26 - More details - Source on GitHub

java.lang.AssertionError: 
1 expectation failed.
Response body doesn't match expectation.

---

⚙️ JVM Tests - JDK 11 Windows #

- Failing: integration-tests/devmode 

📦 integration-tests/devmode

✖ io.quarkus.test.devconsole.DevConsoleOidcSmokeTest.testCaches line 26 - More details - Source on GitHub

java.lang.AssertionError: 
1 expectation failed.
Response body doesn't match expectation.

---

⚙️ JVM Tests - JDK 16 #

- Failing: integration-tests/devmode 

📦 integration-tests/devmode

✖ io.quarkus.test.devconsole.DevConsoleOidcSmokeTest.testCaches line 26 - More details - Source on GitHub

java.lang.AssertionError: 
1 expectation failed.
Response body doesn't match expectation.

[phillip-kruger]

LGTM, just some Tests cases failing ? I think the tests needs updating ?

[sberyozkin]

@phillip-kruger Hi Phillip, thanks, yes, just fixed it - as the title is now set dynamically, Keycloak is only set as a title if keycloak.url is set, OpenId Connect Dev Console otherwise - the latter might work better for both cases...

[sberyozkin]

@phillip-kruger @stuartwdouglas thanks, I've been thinking since yesterday about experimenting with the way it is all named depending on whether it is Keycloak or not, but I'll give it a try a bit later