The files inTools/wasm are a little messy as nearly all Emscripten-related files are inemscripten/ while the WASI-related files are not. So I want to:

• Add awasi/ directory and move code related towasi.py there
• Makewasi.py a deprecated shim for callingwasi/
• UpdateCODEOWNERS such that@freakboy3742 isn't bothered about WASI-only stuff and I'm not bothered about Emscripten-only stuff

Linked PRs

• [3.14] GH-133600: Backport file reorg ofTools/wasm/wasi #135950
• gh-133600: Move config.site-wasm32-emscripten into the emscripten folder #136934
• [3.14] gh-133600: Move config.site-wasm32-emscripten into the emscripten folder (GH-136934) #136956
• gh-133600: RunTools/wasm/wasi on CI instead of deprecatedTools/wasm/wasi.py #140907
• [3.14] gh-133600: RunTools/wasm/wasi on CI instead of deprecatedTools/wasm/wasi.py (GH-140907) #140964