ROX-17712: Remove updater onConflict retry

[ludydoo]

The updater has some logic to retry an update in case of a conflict. But AFAIK, this retry would never lead to a successful response whenever there is a conflict in the first place.

This retry logic doesn't make sense because

• A resource that was changed on the server will never be able to be updated before being refreshed
• It will make the next attempts much more likely to fail, as it delays those attempts with a backoff

This PR removes the retry logic on updates

[porridge]

This looks good to me but we should definitely discuss this with @joelanford and forward this upstream if this helps in our case.

[SimonBaeumer]

@ludydoo Can you open this PR upstream? If we get it merged upstream we can implement it downstream as well.
My main concern is that we diverge from upstream too much when we did not 100% understood the reasoning behind a removal.
If the removal of the retry fixes a bug which affects us we can remove it here as well directly.

[ludydoo]

for reference operator-framework/helm-operator-plugins#217