Add tests for REL1_40

[paladox]

• Makes all master mediawiki tests experimental.
• Upgrade php 8.1 to 8.2

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (6f2834a) 0.00% compared to head (959a2fd) 0.00%. Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##             master    #252   +/-   ##
========================================
  Coverage      0.00%   0.00%           
  Complexity     1569    1569           
========================================
  Files            23      23           
  Lines          4262    4262           
========================================
  Misses         4262    4262           

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