Skip waiting for finalization of ExecuteRedeem event to speed up process

[ebma]

Context

At the moment, the process waits for the finalization of the redeem execution on Spacewalk. This is not necessary as it's only relevant whether the tokens arrived on the Stellar account or not. By cutting this out from the process, we can simplify the logic and save a couple of seconds.

TODO

Instead of waiting for the ExecuteRedeem event to be emitted here, the process can just check if the tokens already arrived on the Stellar account. This is already done in the error case here.

[ebma]

@pendulum-chain/product this ticket is a low-effort improvement speeding up the offramping flow. We should do it soon.

[ebma]

Hey team! Please add your planning poker estimate with Zenhub @gianfra-t @b-yap @Sharqiewicz @TorstenStueber

[vadaynujra]

@prayagd not high priority since it only quickens the off-ramp by a couple of seconds.

[prayagd]

@vadaynujra moved this back to being prepared in the light of current prioritization