refactor: remove parentLocator and next button from component picker [FC-0062]

[navinkarkera]

Description

Removes the need to parentLocator to component picker and removes next button as well. Now when a user selects a library, they are taken to the next page to select components as no other action is required in library selection page.

Supporting information

• For feat: adds Library Content button to Studio Unit page [FC-0062] edx-platform#35670

Testing instructions

Please see openedx/edx-platform#35670

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.12%. Comparing base (56e025a) to head (76e5c14).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1412      +/-   ##
==========================================
- Coverage   93.12%   93.12%   -0.01%     
==========================================
  Files        1050     1050              
  Lines       20140    20132       -8     
  Branches     4204     4272      +68     
==========================================
- Hits        18755    18747       -8     
+ Misses       1325     1322       -3     
- Partials       60       63       +3     

☔ View full report in Codecov by Sentry.
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[bradenmacdonald]

Works well and code looks good! Just asked on Slack about removing the "Next" step