Calibrator pipelines support

[natestemen]

Description

WIP, adds support for specifying pipeline strings in the calibrator to specify techniques, but not parameters.

[codecov]

Codecov Report

❌ Patch coverage is 66.79104% with 89 lines in your changes missing coverage. Please review.
✅ Project coverage is 96.56%. Comparing base (1581330) to head (e40d7cd).
⚠️ Report is 77 commits behind head on main.

Files with missing lines	Patch %	Lines
mitiq/calibration/settings.py	53.22%	58 Missing ⚠️
mitiq/calibration/calibrator.py	78.47%	31 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2841      +/-   ##
==========================================
- Coverage   98.24%   96.56%   -1.69%     
==========================================
  Files         101      101              
  Lines        4682     4942     +260     
==========================================
+ Hits         4600     4772     +172     
- Misses         82      170      +88     

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