Make multithreaded tests with asserts more robust

## Brief feature description

From https://github.com/elkodon/elkodon/issues/25#issuecomment-1793128951

========

@elfenpiff I found this https://stackoverflow.com/questions/35988775/how-can-i-cause-a-panic-on-a-thread-to-immediately-end-the-main-thread/36031130#36031130

The following code would terminate the whole test when an assert in a thread fails. It can also be placed in a function which could be called at the start of a test
```rust
let orig_hook = panic::take_hook();
panic::set_hook(Box::new(move |panic_info| {
// invoke the default handler and exit the process
orig_hook(panic_info);
process::exit(1);
}));
```

========

Start by locating the multithreaded tests and their current assertion or panic handling, then review the referenced panic-hook approach using panic::take_hook, panic::set_hook, and process::exit. Done means an assertion failure in a test thread reliably terminates the whole test rather than leaving the test running or hiding the failure.

Written by the indexing model from the issue text.