refactor[venom]: update translator for `deploy` instruction

[charles-cooper]

this commit updates ir_node_to_venom.py for the deploy instruction to properly emit the exit instruction. it also removes places in the translator where the exit instruction was improperly emitted.

misc:

• update style to continue early in the loop rather than nest.

What I did

fix #4317

How I did it

How to verify it

Commit message

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Description for the changelog

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 55.55556% with 4 lines in your changes missing coverage. Please review.

Project coverage is 90.21%. Comparing base (b3ea663) to head (16460d1). Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
vyper/venom/function.py	42.85%	3 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #4318 +/- ## ========================================== - Coverage 91.40% 90.21% -1.20% ========================================== Files 112 112 Lines 15927 15927 Branches 2694 2693 -1 ========================================== - Hits 14558 14368 -190 - Misses 935 1093 +158 - Partials 434 466 +32 ```

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