[Speaker] Allow consent audio to be deleted

[imnasnainaec]

But don't allow speakers to be associated with consent audio (accomplished by the AudioPlayer component with the updateAudioSpeaker prop undefined).

Follow-up to #2795

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This change is 

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (32c22c7) 72.56% compared to head (60994d8) 83.17%.

❗ Current head 60994d8 differs from pull request most recent head 390a219. Consider uploading reports for the commit 390a219 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #2873       +/-   ##
===========================================
+ Coverage   72.56%   83.17%   +10.60%     
===========================================
  Files         262       46      -216     
  Lines        9976     4808     -5168     
  Branches     1163      568      -595     
===========================================
- Hits         7239     3999     -3240     
+ Misses       2398      671     -1727     
+ Partials      339      138      -201     

Flag	Coverage Δ
backend	83.17% <ø> (-0.19%)	⬇️
frontend	?

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[jmgrady]

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)