Fix library-like compiler path configs

[toinehartman]

Fixes #2743.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 46%. Comparing base (827298e) to head (41868a7).

Files with missing lines	Patch %	Lines
src/org/rascalmpl/library/util/PathConfig.java	83%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##              main   #2744   +/-   ##
=======================================
  Coverage       46%     46%           
- Complexity    6721    6729    +8     
=======================================
  Files          794     794           
  Lines        65912   65917    +5     
  Branches      9888    9891    +3     
=======================================
+ Hits         30824   30844   +20     
+ Misses       32698   32691    -7     
+ Partials      2390    2382    -8     

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[jurgenvinju]

Good fix towards the next step (never creating pathconfig for library projects anymore)

[jurgenvinju]

@toinehartman this is the test you wanted to remove right?

[toinehartman]

After our discussion, I was thinking of nuking this PR altogether, instead fixing this where library modules are opened (in LSP).