Add --site-url parameter for custom domain configuration in site crea… #792

Job	Run time
code-quality / PHPStan	34s
code-quality / Lint Gherkin Feature files	17s
code-quality / Spell check	8s
code-quality / PHPCS	26s
code-quality / Lint GitHub Actions workflows	9s
code-quality / Lint PHP files	21s
	1m 55s

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