🚨 fix Qiskit 0.46.0 deprecation warnings

[burgholzer]

Description

This PR works around some newly introduced deprecation warnings in the latest Qiskit version.

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

All modified and coverable lines are covered by tests ✅

Comparison is base (79fae0d) 96.0% compared to head (323284d) 90.5%.

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #360     +/-   ##
=======================================
- Coverage   96.0%   90.5%   -5.6%     
=======================================
  Files         34      34             
  Lines       1754    1754             
  Branches     215     215             
=======================================
- Hits        1685    1588     -97     
- Misses        69     166     +97     

Flag	Coverage Δ		*Carryforward flag
cpp	95.7% <ø> (ø)		Carriedforward from 735f1e1
python	72.5% <ø> (-24.7%)	⬇️

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

see 1 file with indirect coverage changes