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4af87fd0 - fix(infra): fix trailing comma regex in profile generation script (#35333)

fix(infra): fix trailing comma regex in profile generation script (#35333) The trailing comma regex in the profile generation script consumed the closing `}` as part of its match, preventing nested closing braces from getting their own trailing comma. This caused `ruff format` failures on every generated `_profiles.py` file. Switches to a lookahead (`(?=...)`) so the closing bracket is asserted but not consumed, allowing each nesting level to independently receive its trailing comma. Fixes #35332.