sort: use pdqsort · golang/go@72e77a7

- Across all benchmarks, pdqsort is never significantly slower than the previous algorithm. - In common patterns, pdqsort is often faster (i.e. 10x faster in sorted slices). The pdqsort is described at https://arxiv.org/pdf/2106.05123.pdf This CL is inspired by both C++ implementation and Rust implementation. - C++ implementation: https://github.com/orlp/pdqsort - Rust implementation: https://docs

[tmatsuu]

golangのソート実装がquicksortからpdqsortに変更。ほう。