adapt to new qiskit version.

[pehamTom]

Description

The newest Qiskit release introduced some new deprecations and, unfortunately, also some internal deprecation warnings that now surface in our tests and must be ignored.
This PR adjusts MQT QCEC to these latest changes.

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

Merging #327 (cd4e37d) into main (91ecd04) will increase coverage by 0.0%.
The diff coverage is 100.0%.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #327   +/-   ##
=====================================
  Coverage   96.0%   96.0%           
=====================================
  Files         34      34           
  Lines       1739    1740    +1     
  Branches     212     212           
=====================================
+ Hits        1671    1672    +1     
  Misses        68      68           

Flag	Coverage Δ		*Carryforward flag
cpp	95.7% <ø> (ø)		Carriedforward from 91ecd04
python	97.2% <100.0%> (+<0.1%)	⬆️

*This pull request uses carry forward flags. Click here to find out more.

Files	Coverage Δ
src/mqt/qcec/parameterized.py	94.8% <100.0%> (+<0.1%)	⬆️

[burgholzer]

Many thanks. Just one small thing to fix so that CI runs through.
Could you also please add a proper PR description? 🙃