fix: check if new LDAP users will exceed the license

[tapiarafael]

Proposed changes (including videos or screenshots)

Check the license before inserting new users on the LDAP Sync. (It will continue to update existing users)

Issue(s)

CORE-990

Steps to test or reproduce

Further comments

[dionisio-bot]

Looks like this PR is not ready to merge, because of the following issues:

• This PR is missing the 'stat: QA assured' label
• This PR is targeting the wrong base branch. It should target 7.5.0, but it targets 7.4.0

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.45%. Comparing base (e1ef47d) to head (84446c1).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #35244   +/-   ##
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  Coverage    59.45%   59.45%           
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  Files         2828     2828           
  Lines        68159    68159           
  Branches     15124    15124           
========================================
  Hits         40521    40521           
  Misses       24982    24982           
  Partials      2656     2656           

Flag	Coverage Δ
unit	75.70% <ø> (ø)

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[changeset-bot]

🦋 Changeset detected

Latest commit: 84446c1

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

This PR includes changesets to release 35 packages

Name	Type
@rocket.chat/meteor	Patch
@rocket.chat/core-typings	Patch
@rocket.chat/rest-typings	Patch
@rocket.chat/uikit-playground	Patch
@rocket.chat/api-client	Patch
@rocket.chat/apps	Patch
@rocket.chat/core-services	Patch
@rocket.chat/cron	Patch
@rocket.chat/ddp-client	Patch
@rocket.chat/freeswitch	Patch
@rocket.chat/fuselage-ui-kit	Patch
@rocket.chat/gazzodown	Patch
@rocket.chat/livechat	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/license	Patch
@rocket.chat/omnichannel-services	Patch
@rocket.chat/pdf-worker	Patch
@rocket.chat/presence	Patch
rocketchat-services	Patch
@rocket.chat/models	Patch
@rocket.chat/network-broker	Patch
@rocket.chat/ui-avatar	Patch
@rocket.chat/ui-client	Patch
@rocket.chat/ui-video-conf	Patch
@rocket.chat/ui-voip	Patch
@rocket.chat/web-ui-registration	Patch
@rocket.chat/instance-status	Patch

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[tapiarafael]

I can't write tests for this one. E2E is impossible because of the LDAP, and unit testing is almost insane, considering how much I would need to mock and how artificial the test would be.
The best scenario would be extracting the license seat validation to a function and testing the function isolated, but this would be only to say that we have tests, since I would be testing a dumb sum equation (2 users + 2 newUsers >= licenseLimit)