gh-128630: Optimize marshalled data handling by using bytearray instead of bytes

[Stelios-X]

Summary

This optimizes the handling of marshalled data in the _freeze_module.py script by using bytearray instead of bytes. This change improves performance when writing the data to the output file, as bytearray is mutable and can be modified in place.

Changes Made

1. Function compile_and_marshal:

   • Changed the return type from bytes to bytearray.
   • Converted the marshalled bytes to bytearray.

2. Function write_code:

   • Updated the parameter type from bytes to bytearray.

[cpython-cla-bot]

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[bedevere-app]

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[JelleZijlstra]

Just changing the type annotations won't make anything faster. Please test your change first and show benchmarks that prove that it improves performance.