chore: Replicate IPreRoomUserLeave and IPostRoomUserLeave event in meteor method and added removedBy to IRoomUserLeaveContext

[gabriellsh]

Proposed changes (including videos or screenshots)

Issue(s)

CORE-498
Depends on RocketChat/Rocket.Chat.Apps-engine#779

Steps to test or reproduce

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Latest commit: d2730f3

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[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 56.72%. Comparing base (06707d8) to head (d2730f3).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #32724      +/-   ##
===========================================
+ Coverage    56.69%   56.72%   +0.02%     
===========================================
  Files         2495     2498       +3     
  Lines        55352    55403      +51     
  Branches     11448    11460      +12     
===========================================
+ Hits         31382    31425      +43     
- Misses       21267    21271       +4     
- Partials      2703     2707       +4     

Flag	Coverage Δ
e2e	56.43% <ø> (+0.01%)	⬆️
e2e-api	41.37% <85.71%> (+0.04%)	⬆️
unit	71.97% <ø> (+0.06%)	⬆️

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