Recognize Scala class constructor

[jtulach]

I am developing mixed Java+Scala application with the NetBeans IDE. I got debugging working, but I have problems to place a breakpoint on constructor of some classes. This is the (disassembled) source I see in the editor:

I can place a method breakpoint on it (as the triangle in the left editor gutter indicates). However the breakpoint is then later reported as misplaced.

I tracked this down to problems in recognizing constructor of such strangely named Scala classes like: org.enso.compiler.core.IR$Name$MethodReference. This PR extracts the "constructor recognizing logic" into its own method and adds few tests to verify current behavior. Then it adds a test and a fix to make the code work for my usage case 3205d10.

[neilcsmith-net]

Version increment commit will need removing if intended for delivery.

This probably won't be reviewed in time for rc3, so will need a call whether this change needs to trigger an rc4, otherwise it won't make it in unless something else does.

@mbien is a label required to trigger that test?

[mbien]

@neilcsmith-net java/debugger.jpda.<foo> are in the "Java Modules" job which is always on since its a short job
https://github.com/apache/netbeans/actions/runs/3374691868/jobs/5607816502

however java/debugger.jpda tests are commented out. When I migrated I left everything commented out which was already commented out on travis.

[mbien]

@neilcsmith-net I temp enabled them in #4817. We will see in about 30mins once done if the tests still work. Will update this comment with results.

[jtulach]

This probably won't be reviewed in time for rc3, so will need a call whether this change needs to trigger an rc4

This is a low priority bugfix PR. No need for special RC. Integrate, if you have a chance. If not let's merge to master.

[neilcsmith-net]

Thanks @jtulach Will be kept in mind if we have an rc4.

Version change fixed.

[mbien]

many tests fail, so we can't turn java/debugger.jpda on right now:
https://github.com/apache/netbeans/actions/runs/3379257947/jobs/5611704286

[entlicher]

Looks good.