fix(integrations): show error instead of infinite spinner on sentry app external install page #248188

Job	Run time
detect what files changed	15s
requirements check	0s
api docs test	-1s
backend migration tests	-1s
cli test	-1s
check migration	-1s
api url typescript generation	-1s
select tests	-1s
calculate test shards	-1s
monolith-dbs test	-1s
backend typing	-1s
Backend	4s
backend test	0s
	10s

Provide feedback