Update Helm release keycloak to v20 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
keycloak (source)	major	19.4.1 -> 20.0.1

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.

[ricsanfre]

Major breaking changes: https://github.com/bitnami/charts/pull/24671

Keycloak admin console fails to open with logs

2024-04-04 15:38:02,176 WARN  [org.keycloak.services] (executor-thread-1) KC-SERVICES0075: Failed to get theme request: java.lang.RuntimeException: Temporary directory /opt/bitnami/keycloak/bin/../data/tmp does not exist and it was not possible to create it.
    at org.keycloak.quarkus.runtime.integration.QuarkusPlatform.getTmpDirectory(QuarkusPlatform.java:152)
    at org.keycloak.encoding.GzipResourceEncodingProviderFactory.initCacheDir(GzipResourceEncodingProviderFactory.java:70)
    at org.keycloak.encoding.GzipResourceEncodingProviderFactory.create(GzipResourceEncodingProviderFactory.java:29)
    at org.keycloak.encoding.GzipResourceEncodingProviderFactory.create(GzipResourceEncodingProviderFactory.java:18)
    at org.keycloak.services.DefaultKeycloakSession.getProvider(DefaultKeycloakSession.java:195)
    at org.keycloak.models.KeycloakBeanProducer_ProducerMethod_getKeycloakSession_5e84845135ceb04ddba6a5e518c0329028840943_ClientProxy.getProvider(Unknown Source)
    at org.keycloak.encoding.ResourceEncodingHelper.getResourceEncodingProvider(ResourceEncodingHelper.java:14)
    at org.keycloak.services.resources.ThemeResource.getResource(ThemeResource.java:81)
    at org.keycloak.services.resources.ThemeResource$quarkusrestinvoker$getResource_808824b51c03e102b8d400a19f17c54968201e8a.invoke(Unknown Source)
    at org.jboss.resteasy.reactive.server.handlers.InvocationHandler.handle(InvocationHandler.java:29)
    at io.quarkus.resteasy.reactive.server.runtime.QuarkusResteasyReactiveRequestContext.invokeHandler(QuarkusResteasyReactiveRequestContext.java:141)
    at org.jboss.resteasy.reactive.common.core.AbstractResteasyReactiveContext.run(AbstractResteasyReactiveContext.java:145)
    at io.quarkus.vertx.core.runtime.VertxCoreRecorder$14.runWith(VertxCoreRecorder.java:576)
    at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2513)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1538)
    at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29)
    at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:840)

Some of the security configuration changes need to be rolled-back:

containerSecurityContext:
  readOnlyRootFilesystem: false