Remove redundant OTP events (#7542) #20915

Job	Run time
Generate the matrix for subscriptions-tests dynamically	3s
WP - nightly \| WC - latest \| wcpay - merchant	13m 57s
WP - nightly \| WC - latest \| wcpay - shopper	13m 55s
WP - nightly \| WC - latest \| subscriptions - merchant	6m 10s
WP - nightly \| WC - latest \| subscriptions - shopper	9m 37s
WC - 7.7.0 \| wcpay - merchant	15m 18s
WC - 7.7.0 \| wcpay - shopper	15m 2s
WC - 7.7.0 \| subscriptions - merchant	7m 45s
WC - 7.7.0 \| subscriptions - shopper	9m 22s
WC - latest \| wcpay - merchant	14m 51s
WC - latest \| wcpay - shopper	14m 46s
WC - latest \| subscriptions - merchant	7m 27s
WC - latest \| subscriptions - shopper	8m 54s
WC - beta \| wcpay - merchant	15m 26s
WC - beta \| wcpay - shopper	13m 45s
WC - beta \| subscriptions - merchant	6m 48s
WC - beta \| subscriptions - shopper	8m 0s
	3h 1m 6s

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