bug: do not fail to install if no embedded cluster installation #4362
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What this PR does / why we need it:
if no embedded cluster installation object has been found in the cluster we can't start an upgrade. on this case (where the installation does not exists) we shouldn't be failing but moving on instead.
during the initial cluster bootstrap the installation object may take a while to be created therefore a scenario where the kots app is installed but no installation object exists is valid.