🩹 fixes for noise-aware simulation in DDSIM

[burgholzer]

Description

This PR contains a couple of fixes for the noise-aware simulation techniques currently being reworked in cda-tum/mqt-ddsim#321.

More precisely, this PR makes sure that the corresponding DD package configs are already defined in the mqt-core library and that explicit instantiations for the methods relevant for DDSIM are in place.

Checklist:

• The pull request only contains commits that are related to it.
• I have added appropriate tests and documentation.
• I have made sure that all CI jobs on GitHub pass.
• The pull request introduces no new warnings and follows the project's style guidelines.

[codecov]

Codecov Report

Attention: Patch coverage is 97.07113% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 91.1%. Comparing base (1db2860) to head (9c377f4).

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #551   +/-   ##
=====================================
  Coverage   91.1%   91.1%           
=====================================
  Files        131     132    +1     
  Lines      13761   13794   +33     
  Branches    2164    2166    +2     
=====================================
+ Hits       12539   12573   +34     
+ Misses      1222    1221    -1     

Flag	Coverage Δ
cpp	90.8% <97.0%> (+<0.1%)	⬆️
python	99.5% <ø> (ø)

Files	Coverage Δ
include/mqt-core/dd/NoiseFunctionality.hpp	100.0% <ø> (+4.3%)	⬆️
src/dd/FunctionalityConstruction.cpp	96.8% <ø> (-0.8%)	⬇️
src/dd/NoiseFunctionality.cpp	97.0% <97.0%> (ø)

... and 3 files with indirect coverage changes