Build/Test Tools: Add a start period to the MySQL healthcheck.

Merges [62937] to the 6.5 branch.

Reviewed by: johnbillion.
See #65752.

git-svn-id: https://develop.svn.wordpress.org/branches/6.5@62982 602fd350-edb4-49c9-b593-d223f7449a82

Author: lancewillett

docker-compose.yml

@@ -86,6 +86,7 @@ services:
       timeout: 5s
       interval: 5s
       retries: 10
+      start_period: 60s
 
   ##
   # The WP CLI container.