[Bug] Better handling missing modules in target JVM

### Current Behavior

Currently, when `jdk.management.jfr` module is missing in target VM, :
* very cryptic issue is show on the ui,
* in logs there is a trace like in https://github.com/cryostatio/cryostat/discussions/595#discussioncomment-10420357

### Expected Behavior

See notification / popup suggesting what is the actual problem, like missing JFR module

### Steps To Reproduce

_No response_

### Environment

```Markdown
- OS:
- Environment:
- Version:
```

### Anything else?

Related discussion - https://github.com/cryostatio/cryostat/discussions/595#discussioncomment-10420960

Start by reproducing the issue with a target JVM missing the jdk.management.jfr module, then follow the error from the logs to the UI behavior described in the linked discussion. Done means the UI shows a notification or popup identifying the missing JFR module instead of the current cryptic error.

Written by the indexing model from the issue text.