Revert "Amend changelog entries for release 8.6.1" (#9978) #23860

Job	Run time
Generate the matrix for subscriptions-tests dynamically	1s
WP - nightly \| WC - latest \| wcpay - merchant	13m 19s
WP - nightly \| WC - latest \| wcpay - shopper	26m 14s
WP - nightly \| WC - latest \| subscriptions - merchant	4m 44s
WP - nightly \| WC - latest \| subscriptions - shopper	8m 51s
WC - 7.7.0 \| wcpay - merchant	13m 6s
WC - 7.7.0 \| wcpay - shopper	27m 33s
WC - 7.7.0 \| subscriptions - merchant	4m 48s
WC - 7.7.0 \| subscriptions - shopper	10m 43s
WC - latest \| wcpay - merchant	14m 18s
WC - latest \| wcpay - shopper	29m 15s
WC - latest \| subscriptions - merchant	5m 1s
WC - latest \| subscriptions - shopper	11m 19s
WC - beta \| wcpay - merchant	13m 23s
WC - beta \| wcpay - shopper	30m 59s
WC - beta \| subscriptions - merchant	4m 47s
WC - beta \| subscriptions - shopper	10m 43s
	3h 49m 4s

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