Collect frequencies before processing sweeps

[hay-k]

Processed sweeps uses frequency from characterization section. This leads to inconsistency when user updates the frequency of native pulse, but does not update the characterization section (e.g. readout_frequency). This change fixes this inconsistency.

All of this is being removed for 0.2 release (#885). This fix is needed for short term, before the realease.

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.64%. Comparing base (b93ee1b) to head (5f5f54a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #902   +/-   ##
=======================================
  Coverage   66.64%   66.64%           
=======================================
  Files          55       55           
  Lines        5954     5954           
=======================================
  Hits         3968     3968           
  Misses       1986     1986           

Flag	Coverage Δ
unittests	66.64% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Jacfomg]

👍