Build/Test Tools: Avoid using `*-latest` tags for runner images. #2007

Job	Run time
Single site report / PHP 8.3 with MySQL 8.4	45m 40s
Multisite report / PHP 8.3 with MySQL 8.4 multisite	45m 30s
Slack Notifications / Prepare notifications	2s
Slack Notifications / Failure notifications	0s
Slack Notifications / Fixed notifications	0s
Slack Notifications / Success notifications	3s
Slack Notifications / Cancelled notifications	0s
Failed workflow tasks	0s
	1h 31m 15s

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