fix: Check blocked addresses before sending tokenize shares rewards

[stana-miric]

Description

Before distributing tokenized share rewards, the recipient's address must be verified. If the address is on the blocked list, the rewards should not be sent.

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[MSalopek]

I'm generally okay with the changes.

However, parts seem to be missing.

Could you please elaborate why the blocked addr check is not in each of these functions (on the keeper):

WithdrawSingleShareRecordReward()
WithdrawTokenizeShareRecordReward()
WithdrawAllTokenizeShareRecordReward()

[MSalopek]

Please consider moving this check to the WithdrawTokenizeShareRecordReward function. It contains all the validation for the procedure. It should be near the top of the function, right after fetch/unmarshal steps.