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viable/strict/1790378695: [dynamo] Convert bytecode dicts to lists (#196771)

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What happened

We only ever append to these dictionaries one-at-a-time, so switch to lists and remove 1 us of warm-cache compile launch overhead. Pull Request resolved: #196771 Approved by: https://github.com/guilhermeleobas , https://github.com/williamwen42 , https://github.com/mlazos ghstack dependencies: #195951 , #197451 , #197566 , #197733 , #198019

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