Debugging fixes

[sdedic]

Late as always, but this time at least not affecting the IDE operation ....

During debugging of #7037, I've realized that debug flag was dropped during December from gradle tooling classes injected into gradle daemon. Debug info is needed for debugging and is very useful in stacktraces of user reports; I believe this change should go to the NB21 to provide better diagnostics.

The second fix is the name of the evn variable that NBLS launcher reads to inject extra options to the NBLS server. We used dotted name for historical reasons, but it seems it should be changed so that it is easier to set it up from the shell launcher. Dotted env var name requires use of env to launch the process, which is not always possible, i.e. in vscode remote development scenario that does a ssh login.

None of the changes affect normal IDE or NBLS operation. Please consider to include it into RC3, if not being already built.

[neilcsmith-net]

Makes sense.

Should it have a debuglevel? I think this builds with all debug info, rather than the previous (source,lines) setting? Although I think that's the same as the IDE as a whole?!

[sdedic]

IMHO if it builds with local variables, it is easier to attach to the daemon without recompilation for inspection. Also note that the gradle buildscript is not much used in the build, since in Dec 2023, the gradle build was replaced with ant build.

[neilcsmith-net]

Sure, no problem with that - I was just comparing with the pre-Dec 2023 behaviour.

[lkishalmi]

Looks good. Thanks!