[Tests-Only] Add acceptance test to show available backends using the occ command

[jasson99]

Description

This PR adds acceptance test to show available authentication and storage backends using the occ command

Related Issue

#36704

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)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE

[codecov]

Codecov Report

Merging #37035 into master will not change coverage by %.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #37035   +/-   ##
=========================================
  Coverage     64.75%   64.75%           
  Complexity    19138    19138           
=========================================
  Files          1270     1270           
  Lines         74912    74912           
  Branches       1329     1329           
=========================================
  Hits          48513    48513           
  Misses        26008    26008           
  Partials        391      391           

Flag	Coverage Δ	Complexity Δ
#javascript	54.17% <ø> (ø)	0.00 <ø> (ø)	⬆️
#phpunit	65.93% <ø> (ø)	19138.00 <ø> (ø)	⬆️

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[phil-davis]

@jasson99 now there are conflicts - needs rebase