[FIX] Do not count Matrix federated users as a valid EE seat

[MarcosSpessatto]

Proposed changes (including videos or screenshots)

Issue(s)

Matrix federated (external) users were being counted as a valid EE seat.

Steps to test or reproduce

Further comments

[codecov[bot]]

Codecov Report

Merging #26525 (96f81b1) into improve/federation-general-improvements (24ac9c4) will decrease coverage by 0.09%. The diff coverage is n/a.

@@                             Coverage Diff                             @@
##           improve/federation-general-improvements   #26525      +/-   ##
===========================================================================
- Coverage                                    38.07%   37.98%   -0.10%     
===========================================================================
  Files                                          745      745              
  Lines                                        18625    18625              
  Branches                                      1412     1412              
===========================================================================
- Hits                                          7091     7074      -17     
- Misses                                       11313    11330      +17     
  Partials                                       221      221              

Flag	Coverage Δ
e2e	37.98% <ø> (-0.10%)	:arrow_down:

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