🐛 Add new addon alpha2 fields as optional to alpha1. #1803

Job	Run time
build	2m 20s
build-image	2m 14s
fmt	16s
test-api	3m 6s
test-unit	3m 11s
vet	1m 25s
test-e2e	8m 41s
test-integration / e2e-api-integration-tests	19m 34s
test-integration / e2e-ui-integration-tests (tier0)	26m 37s
	1h 7m 24s

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