chore: Add the possibility for removing the watcher for the message collection

[MarcosSpessatto]

Proposed changes (including videos or screenshots)

https://rocketchat.atlassian.net/browse/ARCH-1208

Issue(s)

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Latest commit: b790dd8

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[MarcosSpessatto]

@ggazzo @sampaiodiego I decided to create another event to handle the "manual" process of sending events instead of using the existing watch.messages.

[codecov]

Codecov Report

Merging #30381 (b790dd8) into develop (4f09b2e) will increase coverage by 4.84%.
The diff coverage is 33.33%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #30381      +/-   ##
===========================================
+ Coverage    46.31%   51.16%   +4.84%     
===========================================
  Files          766      807      +41     
  Lines        14677    15140     +463     
  Branches      2753     2820      +67     
===========================================
+ Hits          6798     7746     +948     
+ Misses        7480     6960     -520     
- Partials       399      434      +35     

Flag	Coverage Δ
e2e	48.07% <33.33%> (+5.66%)	⬆️
unit	66.21% <ø> (ø)

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