Remove WC beta tests from matrix config & add a todo comment (#7598) #20961

Job	Run time
Generate the matrix for subscriptions-tests dynamically	2s
Generate the matrix for subscriptions-tests dynamically	2s
WP - nightly \| WC - latest \| wcpay - merchant	27m 2s
WP - nightly \| WC - latest \| wcpay - merchant	27m 2s
WP - nightly \| WC - latest \| wcpay - shopper	17m 19s
WP - nightly \| WC - latest \| wcpay - shopper	20m 1s
WP - nightly \| WC - latest \| subscriptions - merchant	6m 13s
WP - nightly \| WC - latest \| subscriptions - merchant	6m 13s
WP - nightly \| WC - latest \| subscriptions - shopper	9m 33s
WP - nightly \| WC - latest \| subscriptions - shopper	9m 33s
WC - 7.7.0 \| wcpay - merchant	26m 24s
WC - 7.7.0 \| wcpay - merchant	26m 24s
WC - 7.7.0 \| wcpay - shopper	12m 58s
WC - 7.7.0 \| wcpay - shopper	12m 58s
WC - 7.7.0 \| subscriptions - merchant	8m 54s
WC - 7.7.0 \| subscriptions - merchant	8m 54s
WC - 7.7.0 \| subscriptions - shopper	7m 54s
WC - 7.7.0 \| subscriptions - shopper	7m 54s
WC - latest \| wcpay - merchant	24m 20s
WC - latest \| wcpay - merchant	24m 20s
WC - latest \| wcpay - shopper	14m 46s
WC - latest \| wcpay - shopper	14m 46s
WC - latest \| subscriptions - merchant	6m 2s
WC - latest \| subscriptions - merchant	6m 2s
WC - latest \| subscriptions - shopper	9m 25s
WC - latest \| subscriptions - shopper	9m 25s
	5h 44m 26s

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