chore!: Remove streamhub

[ggazzo]

https://rocketchat.atlassian.net/browse/ARCH-1460

https://rocketchat.atlassian.net/browse/ARCH-1603

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Latest commit: 6529acd

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[codecov]

Codecov Report

Attention: Patch coverage is 19.60784% with 164 lines in your changes missing coverage. Please review.

Project coverage is 64.63%. Comparing base (4e37cdd) to head (6529acd).
Report is 1 commits behind head on release-8.0.0.

Additional details and impacted files

@@                Coverage Diff                @@
##           release-8.0.0   #35964      +/-   ##
=================================================
- Coverage          64.63%   64.63%   -0.01%     
=================================================
  Files               3244     3244              
  Lines              95341    95363      +22     
  Branches           17849    17879      +30     
=================================================
+ Hits               61627    61641      +14     
- Misses             30821    30826       +5     
- Partials            2893     2896       +3     

Flag	Coverage Δ
e2e	58.12% <ø> (-0.08%)	⬇️
unit	71.93% <19.60%> (+0.03%)	⬆️

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