fix: send XBlock visibility status to the LMS

[Cup0fCoffee]

Port of https://github.com/open-craft/frontend-app-learning/pull/35/files

TLDR: there are two commits that change how the completions are tracked - one in edx-platform and one in learning MFE. One doesn't work without the other. The client's instances are running edx-platform with the change (opencraft-release/redwood.1), but MFE without the change (asu-moe/redwood-css), so the completions are not being tracked correctly.

To test, make sure both are deployed, go to a course, and test that opening a subsection with HTML and Text XBlocks is marked completed after 5 seconds of being visible.

BB-9275

[codecov]

Codecov Report

Attention: Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.49%. Comparing base (cb1a614) to head (26da658).
Report is 5 commits behind head on asu-moe/redwood-css.

Files with missing lines	Patch %	Lines
...re/course/sequence/Unit/hooks/useIFrameBehavior.js	94.11%	1 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                   @@
##           asu-moe/redwood-css      #43      +/-   ##
=======================================================
+ Coverage                88.77%   89.49%   +0.72%     
=======================================================
  Files                      306      306              
  Lines                     5256     5275      +19     
  Branches                  1336     1338       +2     
=======================================================
+ Hits                      4666     4721      +55     
+ Misses                     573      537      -36     
  Partials                    17       17              

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[xitij2000]

Approved as clean cherry-pick of tested code.