Implement synchronous AMD for Twilio IVR

[rowanseymour]

No description provided.

[codecov]

Codecov Report

Merging #474 (e781459) into main (69cf6c4) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #474      +/-   ##
==========================================
+ Coverage   56.94%   56.95%   +0.01%     
==========================================
  Files         123      123              
  Lines        8605     8603       -2     
==========================================
  Hits         4900     4900              
+ Misses       2928     2926       -2     
  Partials      777      777              

Impacted Files	Coverage Δ
core/ivr/twiml/twiml.go	19.13% <ø> (+0.16%)	⬆️

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[rowanseymour]

Closed in favor of #476