fix: fixed course level preference issue

[sundasnoreen12]

INF-1797

Description

We deprecated the “Never” email frequency for emails a while ago.

However, it is still persisting for people who had selected it before deprecation. Even if someone turns on email notifications toggle, “Never” persists.

Acceptance Criteria

Modify UX such that when a person turns on email toggle for a preference from COURSE or ACCOUNT level, the email cadences for that preference should change to “Daily” no matter what it was before (Never/Weekly/Daily).

Merge Checklist

• If your update includes visual changes, have they been reviewed by a designer? Send them a link to the Sandbox, if applicable.
• Is there adequate test coverage for your changes?

Post-merge Checklist

• Deploy the changes to prod after verifying on stage or ask @openedx/edx-infinity to do it.
• 🎉 🙌 Celebrate! Thanks for your contribution.

[codecov]

Codecov Report

Attention: Patch coverage is 84.21053% with 3 lines in your changes missing coverage. Please review.

Project coverage is 58.76%. Comparing base (b103775) to head (1eda648).
Report is 1 commits behind head on 2u-main.

Files with missing lines	Patch %	Lines
src/notification-preferences/data/thunks.js	83.33%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           2u-main    #1209      +/-   ##
===========================================
+ Coverage    58.00%   58.76%   +0.76%     
===========================================
  Files          119      119              
  Lines         2393     2401       +8     
  Branches       656      667      +11     
===========================================
+ Hits          1388     1411      +23     
+ Misses         937      925      -12     
+ Partials        68       65       -3     

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