listcomponents ignores custom libIRT2.so path

### Steps to reproduce: (give a step by step account of how to trigger the bug)
```
git clone git@github.com:eic/irt.git
git clone git@github.com:eic/epic.git

export CMAKE_INSTALL_PREFIX=$PWD/prefix
export LD_LIBRARY_PATH=$PWD/install/lib:$LD_LIBRARY_PATH
export JANA_PLUGIN_PATH=$PWD/install/lib/EICrecon/plugins

cmake -B irt/build -S irt -DDELPHES=OFF
cmake --build irt/build
cmake --install irt/build

cmake -B epic/build -S epic -DCMAKE_PREFIX_PATH=$PWD/install
cmake --build epic/build
```

### Expected Result: (what do you expect when you execute the steps above)
Everything compiles

### Actual Result: (what do you get when you execute the steps above)
```
[100%] Generating libepic.components
ERROR: failed to load libepic.so: /home/veprbl/for_alex/epic/build/lib/libepic.so: undefined symbol: _ZTVN4IRT23IRTE
```