fix(playout): remove unused ecasound package

[jooola]

The recorder has been removed, so the ecasound package isn't used anymore.

[codecov]

Codecov Report

Merging #2496 (7b36533) into main (903a643) will increase coverage by 8.08%.
The diff coverage is 49.50%.

@@            Coverage Diff             @@
##             main    #2496      +/-   ##
==========================================
+ Coverage   61.68%   69.77%   +8.08%     
==========================================
  Files         149      149              
  Lines        4155     4006     -149     
==========================================
+ Hits         2563     2795     +232     
+ Misses       1592     1211     -381     

Flag	Coverage Δ
playout	47.66% <46.22%> (+17.62%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
api/libretime_api/core/models/preference.py	100.00% <ø> (ø)
api/libretime_api/settings/_internal.py	86.20% <ø> (ø)
playout/libretime_playout/liquidsoap/entrypoint.py	100.00% <ø> (ø)
playout/libretime_playout/main.py	0.00% <0.00%> (ø)
playout/libretime_playout/message_handler.py	42.00% <ø> (+42.00%)	⬆️
playout/libretime_playout/notify/main.py	0.00% <0.00%> (ø)
playout/libretime_playout/player/file.py	27.08% <5.26%> (+27.08%)	⬆️
playout/libretime_playout/player/liquidsoap.py	22.65% <14.89%> (+22.65%)	⬆️
playout/libretime_playout/player/fetch.py	27.88% <18.18%> (+27.88%)	⬆️
...out/libretime_playout/player/liquidsoap_gateway.py	45.05% <46.15%> (+1.43%)	⬆️
... and 14 more

... and 2 files with indirect coverage changes

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