viable/strict/1792104652: #200605 Add optional zstd compression for trace exports (#200614)

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Linked issue or supporting maintainer Part of #200605 BC-breaking? No. Existing uncompressed and gzip trace export behavior is preserved. Summary Adds optional Zstandard compression for profiler Chrome traces using the .zst suffix. .json remains uncompressed. .gz keeps existing gzip behavior and compression levels. .zst uses zstd level 1 with a lazy zstandard import. Works with native Kineto export, Python streaming…

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