Always print seed used for --order-by=random

[epdenouden]

Fix #3515 by combining randomness and predictability ☯️

[codecov]

Codecov Report

Merging #3524 into 7.5 will not change coverage.
The diff coverage is 100%.

@@            Coverage Diff            @@
##                7.5    #3524   +/-   ##
=========================================
  Coverage     83.39%   83.39%           
  Complexity     3623     3623           
=========================================
  Files           143      143           
  Lines          9648     9648           
=========================================
  Hits           8046     8046           
  Misses         1602     1602

Impacted Files	Coverage Δ	Complexity Δ
src/TextUI/TestRunner.php	68.16% <100%> (ø)	293 <0> (ø)	⬇️
src/Runner/Version.php	66.66% <0%> (ø)	8% <0%> (ø)	⬇️

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