Combining readout circuits for QWC pauli strings in the measure_pauli_strings method

[ddddddanni]

PR #7236 adds the feature to measure groups of qubit-wise-commuting Pauli operators simultaneously.

However, the current implementation generates a separate readout circuit for each individual Pauli operator within a group. This leads to non-simultaneous measurements, which is corrected in this PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.68%. Comparing base (8788b62) to head (624b309).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7416      +/-   ##
==========================================
- Coverage   98.69%   98.68%   -0.01%     
==========================================
  Files        1112     1112              
  Lines       97769    97780      +11     
==========================================
+ Hits        96491    96499       +8     
- Misses       1278     1281       +3     

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[eliottrosenberg]

Works great! Thanks, @ddddddanni! Tested in this colab.

[ddddddanni]

Works great! Thanks, @ddddddanni! Tested in this colab.

Thank you!! I will wait for Nour to give a stamp and submit this