General: Introduce wp_get_branch_version() helper to extract major.minor version safely. #33636

Job	Run time
Determine Matrix	5s
Single Site Default / Test before	13m 11s
Single Site Default / Test current	12m 41s
Multisite Memcached / Test current	13m 47s
Multisite Default / Test current	12m 34s
Multisite Default / Test before	13m 15s
Single Site Memcached / Test current	12m 15s
Single Site Memcached / Test before	12m 49s
Multisite Memcached / Test before	13m 11s
Compare / Multisite Default	19s
Compare / Multisite Memcached	15s
Compare / Single Site Memcached	17s
Compare / Single Site Default	13s
Failed workflow tasks	0s
Slack Notifications	0s
	1h 44m 52s

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