chore: make SAML login redirect ready for Meteor 3.0

[matheusbsilva137]

Proposed changes (including videos or screenshots)

• Avoid relying in Meteor.loginWithSamlToken's callback (since it's not reliable in Meteor 3.0).

Issue(s)

Steps to test or reproduce

Further comments

CORE-578

[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 6.12.0, but it targets 6.11.0

Please fix the issues and try again

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[changeset-bot]

⚠️ No Changeset found

Latest commit: 1c23564

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.54%. Comparing base (7442ffc) to head (1c23564).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #32907      +/-   ##
===========================================
+ Coverage    55.51%   55.54%   +0.03%     
===========================================
  Files         2637     2637              
  Lines        57439    57453      +14     
  Branches     11903    11908       +5     
===========================================
+ Hits         31887    31913      +26     
+ Misses       22832    22822      -10     
+ Partials      2720     2718       -2     

Flag	Coverage Δ
e2e	54.09% <40.00%> (+0.07%)	⬆️
unit	72.36% <100.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

[pierre-lehnen-rc]

Closing it as it's no longer needed thanks to #32910