Sonar: This block of commented-out lines of code should be removed

[qmonmert]

Should remove a lot of Sonar code smells like https://sonarcloud.io/project/issues?impactSoftwareQualities=MAINTAINABILITY&resolved=false&id=jhipster-sample-application&open=AY92SBeNzvwT9Xfig0tw

Related to #25231

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[mshima]

I think we should remove the commented code.
I think we can do something like:

Suggested change

	*/
	@SuppressWarnings("java:S125")
	*
	* @see <a href="https://github.com/jhipster/generator-jhipster/tree/v<%- jhipsterVersion %>/generators/gatling#logging-tips">Logging tips</a>
	*/

Add a README.md in https://github.com/jhipster/generator-jhipster/tree/main/generators/gatling with:

## Logging tips

```
LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
{
    // Log all HTTP requests
    //context.getLogger("io.gatling.http").setLevel(Level.valueOf("TRACE"));
    // Log failed HTTP requests
    //context.getLogger("io.gatling.http").setLevel(Level.valueOf("DEBUG"));
}
```

[qmonmert]

@mshima ok let's try this