fix: custom emoji file upload with FileSystem method

[hugocostadev]

Proposed changes (including videos or screenshots)

The issue was happening due to a lack of await the attempt of delete to finishes

Issue(s)

fix #29738

Steps to test or reproduce

1. Go to rocket.chat client
2. Go to Workspace > Settings > Custom Emoji FileSystem
3. Change to something like:
   
4. Restart your server
5. Try to add a new custom emoji In Workspace > Custom Emoji
6. Notice that no error popups and in the terminal the contributor error appears

Further comments

[changeset-bot]

🦋 Changeset detected

Latest commit: 1c2686f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 24 packages

Name	Type
@rocket.chat/meteor	Patch
@rocket.chat/core-typings	Patch
@rocket.chat/rest-typings	Patch
@rocket.chat/core-services	Patch
@rocket.chat/cron	Patch
@rocket.chat/model-typings	Patch
@rocket.chat/ui-contexts	Patch
@rocket.chat/account-service	Patch
@rocket.chat/authorization-service	Patch
@rocket.chat/ddp-streamer	Patch
@rocket.chat/omnichannel-transcript	Patch
@rocket.chat/presence-service	Patch
@rocket.chat/queue-worker	Patch
@rocket.chat/stream-hub-service	Patch
@rocket.chat/api-client	Patch
@rocket.chat/omnichannel-services	Patch
@rocket.chat/pdf-worker	Patch
@rocket.chat/presence	Patch
rocketchat-services	Patch
@rocket.chat/ddp-client	Patch
@rocket.chat/fuselage-ui-kit	Patch
@rocket.chat/models	Patch
@rocket.chat/uikit-playground	Patch
@rocket.chat/instance-status	Patch

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[codecov]

Codecov Report

Merging #29795 (1c2686f) into develop (8be25af) will decrease coverage by 0.64%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop   #29795      +/-   ##
===========================================
- Coverage    46.63%   45.99%   -0.64%     
===========================================
  Files          669      663       -6     
  Lines        12910    12849      -61     
  Branches      2253     2240      -13     
===========================================
- Hits          6020     5910     -110     
- Misses        6561     6614      +53     
+ Partials       329      325       -4     

Flag	Coverage Δ
e2e	45.98% <ø> (-0.63%)	⬇️

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