test: wireguard_multipoint: Add more retries #1180

Job	Run time
check-trigger	4s
unit-test / Build infix x86_64_minimal	2m 8s
build-arm / Build infix arm_minimal	26m 52s
build-x86_64 / Build infix x86_64_minimal	26m 51s
build-aarch64 / Build infix aarch64_minimal	27m 43s
test-run-x86_64 / Regression Test infix x86_64_minimal	48m 31s
test-publish-x86_64	-1s
	2h 12m 8s

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