Adds support for retrieving shotwise output on IonQ devices

[radumarg]

Summary: adds support for shotwise output

Details and comments:

• add memory argument to service, to control the retrieval of shotwise results from IonQ servers. By default memory is False (opt-in behavior).
• retrieve shots from IonQ for QPU jobs and noisy simulator jobs when memory is True
• do not attempt retrieve shots for ideal simulations since these do not exists remotely
• when "memory" is False and shots are needed, the current behavior where shots are generated by sampling the probability distribution will take over
• for unlikely 4xx/5xx errors on retrieving shots a warning will be generated but job will not fail, shots will be instead generated in software for that particular job

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.63%. Comparing base (bde5ffa) to head (36be425).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7738      +/-   ##
==========================================
- Coverage   99.63%   99.63%   -0.01%     
==========================================
  Files        1110     1110              
  Lines      100430   100490      +60     
==========================================
+ Hits       100068   100124      +56     
- Misses        362      366       +4     

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[mhucka]

@radumarg there are some merge conflicts; whenever you get a chance, could you look into them? (No pressure intended; I'm just going around all PRs and checking statuses.)

[radumarg]

@mhucka Fixed the merged issues but converted back to Draft PR because the shot-wise output @ionq was not yet released in production. Will convert back to regular PR when shot-wise output will become available.

[splch]

Cross-SDK we standardized on memory kwarg, off by default. To converge:

1. Add memory: bool = False on Service.create_job()/run(), thread to Job.
2. Gate the fetch in job.py:259-263 on memory and (qpu_or_noisy).
3. Replace the bare except: on job.py:268 with except (IonQException, requests.RequestException) + warnings.warn(...).
4. Add a memory=False default test confirming no GET to /results/shots.
5. Rebase and undraft.