Fix Afterpay checkout error when shipping information is missing (#7541) #20910

Job	Run time
WP - nightly \| WC - latest \| wcpay - merchant	16m 32s
WP - nightly \| WC - latest \| wcpay - shopper	14m 53s
Generate the matrix for subscriptions-tests dynamically	1s
WP - nightly \| WC - latest \| subscriptions - merchant	7m 20s
WP - nightly \| WC - latest \| subscriptions - shopper	8m 42s
WC - 7.7.0 \| wcpay - merchant	13m 26s
WC - 7.7.0 \| wcpay - shopper	15m 2s
WC - 7.7.0 \| subscriptions - merchant	7m 13s
WC - 7.7.0 \| subscriptions - shopper	7m 57s
WC - latest \| wcpay - merchant	13m 56s
WC - latest \| wcpay - shopper	12m 48s
WC - latest \| subscriptions - merchant	5m 39s
WC - latest \| subscriptions - shopper	9m 28s
WC - beta \| wcpay - merchant	15m 22s
WC - beta \| wcpay - shopper	13m 26s
WC - beta \| subscriptions - merchant	7m 12s
WC - beta \| subscriptions - shopper	8m 22s
	2h 57m 19s

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