[stable10] Acceptance test coding standard changes

[phil-davis]

Backport #31516

[phil-davis]

Doing this backport had quite a few conflicts, due to the differences of the php-cs-fixer changes that are in master and not yet in stable10. I generally selected all the conflicting code from master - that gets various bits of those php-cs-fixer changes along with this backport, which does not hurt anything.

There are 2 less files, because a couple of the changes in master were edits to new code related to ```objectstorestuff, which is not yet instable10``. So, of course, it cannot backport.

[codecov]

Codecov Report

Merging #31517 into stable10 will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             stable10   #31517   +/-   ##
===========================================
  Coverage       60.36%   60.36%           
  Complexity      18210    18210           
===========================================
  Files            1194     1194           
  Lines           71829    71829           
  Branches         1248     1248           
===========================================
  Hits            43356    43356           
  Misses          28103    28103           
  Partials          370      370

Flag	Coverage Δ	Complexity Δ
#javascript	52.64% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	61.2% <ø> (ø)	18210 <ø> (ø)	⬇️

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