Performance improvements for disputes reminder task list (#9906) #23867

Job	Run time
Generate the matrix for subscriptions-tests dynamically	1s
WP - nightly \| WC - latest \| wcpay - merchant	14m 4s
WP - nightly \| WC - latest \| wcpay - shopper	30m 37s
WP - nightly \| WC - latest \| subscriptions - merchant	4m 46s
WP - nightly \| WC - latest \| subscriptions - shopper	8m 36s
WC - 7.7.0 \| wcpay - merchant	13m 0s
WC - 7.7.0 \| wcpay - shopper	28m 37s
WC - 7.7.0 \| subscriptions - merchant	4m 52s
WC - 7.7.0 \| subscriptions - shopper	8m 27s
WC - latest \| wcpay - merchant	13m 10s
WC - latest \| wcpay - shopper	26m 39s
WC - latest \| subscriptions - merchant	4m 48s
WC - latest \| subscriptions - shopper	10m 26s
WC - beta \| wcpay - merchant	13m 16s
WC - beta \| wcpay - shopper	30m 46s
WC - beta \| subscriptions - merchant	4m 53s
WC - beta \| subscriptions - shopper	11m 29s
	3h 48m 27s

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