Update pyo3 to v0.26, wasmtime to v37, and wasi to v0.2.6

[juntyr]

• publish updated Rust crates
  • numcodecs
  • numcodecs-python
  • numcodecs-wasm-guest
  • numcodecs-wasm-host
  • numcodecs-wasm-host-reproducible
  • numcodecs-wasm-logging
• publish numcodecs-wasm v0.2 Python package
• update the round.wasm test for numcodecs-wasm-host-reproducible
• bump codec major versions
  • asinh
  • bit-round
  • fixed-offset-scale
  • fourier-network
  • identity
  • jpeg2000
  • linear-quantize
  • log
  • pco
  • random-projection
  • reinterpret
  • round
  • sperr: add quantization step option
  • stochastic-rounding
  • swizzle-reshape
  • sz3
  • tthresh
  • uniform-noise
  • zfp: allow unsafe NaNs
  • zfp-classic: allow unsafe NaNs
  • zlib
  • zstd