Invalidating offline token is not working from client sessions tab

[martin-kanis]

Closes #27275

[jonkoops]

Why do we have two similar types here? This seems like an issue with the data provided, can it not be normalized in the REST API, or even the database?

[martin-kanis]

There is an inconsistency how sessions are obtained on sessions page and on clients/{clientid}/sessions page. As a result there are different sessions types. Created #28124
For this PR, I had to work with what we have at place ATM as this needs to be ready for 24 backport ASAP.

[pedroigor]

I'm not sure if we need to differentiate in-memory and offline sessions when deleting sessions but not a blocker.

[keycloak-github-bot]

Unreported flaky test detected, please review

[keycloak-github-bot]

Unreported flaky test detected

If the flaky tests below are affected by the changes, please review and update the changes accordingly. Otherwise, a maintainer should report the flaky tests prior to merging the PR.

org.keycloak.testsuite.admin.concurrency.ConcurrencyTest#createClient

Keycloak CI - Base IT (1)

java.lang.RuntimeException: There were failures in threads. Failures count: 1
	at org.keycloak.testsuite.admin.concurrency.AbstractConcurrencyTest.run(AbstractConcurrencyTest.java:122)
	at org.keycloak.testsuite.admin.concurrency.AbstractConcurrencyTest.run(AbstractConcurrencyTest.java:63)
	at org.keycloak.testsuite.admin.concurrency.AbstractConcurrencyTest.run(AbstractConcurrencyTest.java:59)
	at org.keycloak.testsuite.admin.concurrency.ConcurrencyTest.concurrentTest(ConcurrencyTest.java:61)
...

Report flaky test