Style of acceptance test string concatenation

[phil-davis]

Description

Adjust the style of string concatenation in places that I found.

Motivation and Context

Review comment #29773 (comment)

How Has This Been Tested?

CI

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests

Checklist:

• Code changes

Open tasks:

• Backport (if applicable set "backport-request" label and remove when the backport was done)

[codecov]

Codecov Report

Merging #32336 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #32336   +/-   ##
=========================================
  Coverage     64.01%   64.01%           
  Complexity    18564    18564           
=========================================
  Files          1171     1171           
  Lines         69851    69851           
  Branches       1267     1267           
=========================================
  Hits          44714    44714           
  Misses        24767    24767           
  Partials        370      370

Flag	Coverage Δ	Complexity Δ
#javascript	52.84% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	65.28% <ø> (ø)	18564 <ø> (ø)	⬇️

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[phil-davis]

@individual-it @DeepDiver1975 please comment - what is the project "standard" for forming strings in PHP?

[DeepDiver1975]

Benefits in Performance and memory consumption are to be ignored when comparing string concat vs string Interpolation.
I find Interpolation nicer to read.

[phil-davis]

@DeepDiver1975 do the style of changes I made here match the style you would like to have?
If yes, then approve this PR.
If no, then mention what could be different (e.g. maybe I went too far putting some things inline with "folder/{$arrayXyz['key']}/stuff" type of syntax)

[phil-davis]

@DeepDiver1975 @individual-it comments or approval please.

[individual-it]

I like concatenation more, but lets not get blocked by that and just define this as standard and get on with work

[phil-davis]

Backport stable10 #32393