API acceptance tests for case-sensitive file move-rename

[phil-davis]

Description

1. Make the content of the apiSkeleton text files all a bit different, so we can easily test which file is "really" which.
2. Add test scenarios for moving files with case differences.

Related Issue

#32357 part

Motivation and Context

Test.allTheThings

How Has This Been Tested?

Local test runs

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
• Unit tests added
• Acceptance tests added

Open tasks:

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

[individual-it]

backport in #32359

[phil-davis]

I added a total of 23 bytes to the skeleton files. I will push a commit that reduces the expected quota by 23 bytes in the relevant tests.

[codecov]

Codecov Report

Merging #32358 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #32358   +/-   ##
=========================================
  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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