Prevent attempt to create Vert.x caching dir caching is disabled

[geoand]

Closes: #28094

[quarkus-bot]

Failing Jobs - Building 2652931

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 17
✔️	JVM Tests - JDK 17 MacOS M1
✔️	JVM Tests - JDK 18

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 11 #

- Failing: integration-tests/oidc-code-flow 

📦 integration-tests/oidc-code-flow

✖ io.quarkus.it.keycloak.CodeFlowTest.testTokenAutoRefresh line 509 - More details - Source on GitHub

com.gargoylesoftware.htmlunit.FailingHttpStatusCodeException: 401 Unauthorized for http://localhost:8081/tenant-autorefresh?state=729dd98b-f061-4013-aff5-742bd4789543&session_state=55c7bdbe-9bb6-4cae-9d8c-b50aea721f12&code=11ba87d8-6408-4a7d-ab9c-61e4a0d25f01.55c7bdbe-9bb6-4cae-9d8c-b50aea721f12.db9522d2-98a8-422b-b0a1-7d4fa792dbfa
	at com.gargoylesoftware.htmlunit.WebClient.throwFailingHttpStatusCodeExceptionIfNecessary(WebClient.java:701)
	at com.gargoylesoftware.htmlunit.WebClient.loadDownloadedResponses(WebClient.java:2452)

---

⚙️ JVM Tests - JDK 11 Windows #

- Failing: extensions/resteasy-reactive/rest-client-reactive/deployment 
! Skipped: extensions/keycloak-admin-client-reactive/deployment extensions/oidc-client-reactive-filter/deployment extensions/oidc-token-propagation-reactive/deployment and 17 more

📦 extensions/resteasy-reactive/rest-client-reactive/deployment

✖ io.quarkus.rest.client.reactive.timeout.BuilderReadTimeoutTest.shouldNotTimeoutOnFastResponse line 53 - More details - Source on GitHub

javax.ws.rs.ProcessingException: The timeout period of 1000ms has been exceeded while executing GET /fast for server localhost:8081
	at org.jboss.resteasy.reactive.client.impl.InvocationBuilderImpl.unwrap(InvocationBuilderImpl.java:220)
	at org.jboss.resteasy.reactive.client.impl.InvocationBuilderImpl.method(InvocationBuilderImpl.java:321)

[sberyozkin]

OIDC test failure can be ignored, looking at the build log, will disable by Monday