paho-mqtt5 potentially requires `opens java.base/java.net=ALL-UNNAMED`

### Description

I stumbled across this by accident. I may have misconfigured something when I was testing, but there's a code path in `org.eclipse.paho.mqttv5.client.internal.NetworkModuleService` that performs field reflection on JDK class `java.net.URI`.

https://github.com/eclipse/paho.mqtt.java/blob/f4e0db802a4433645ef011e711646a09ec9fae89/org.eclipse.paho.mqttv5.client/src/main/java/org/eclipse/paho/mqttv5/client/internal/NetworkModuleService.java#L148-L157

It'd be good to establish whether users could potentially hit this.

Start with org.eclipse.paho.mqttv5.client.internal.NetworkModuleService.java at lines 148-157 and inspect the reflection against java.net.URI. Reproduce the relevant Java module-access behavior and determine whether Camel Quarkus users can reach this path without the suggested JVM option. Done means the impact and required follow-up are confirmed.

Written by the indexing model from the issue text.