Add reason for skipping regeneration in wp media regenerate #384

Job	Run time
code-quality / Lint PHP files	17s
code-quality / Lint GitHub Actions workflows	9s
code-quality / Lint Gherkin Feature files	13s
code-quality / Spell check	5s
code-quality / PHPCS	18s
code-quality / PHPStan	23s
	1m 25s

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