should memory be exported as well?

[yamt]

• there seems to be a consensus memory should be imported for wasi-threads. clarification: https://github.com/WebAssembly/wasi-threads/pull/20
• on the other hand, it's said that memory should be exported in wasi: https://github.com/WebAssembly/WASI/blob/main/legacy/application-abi.md#current-unstable-abi
• it's a bit redundant to both import and export a memory.
• a side note: released versions of LLVM wasm-ld doesn't seem to support both import and export memory. https://reviews.llvm.org/D135898

discussions: https://github.com/WebAssembly/wasi-libc/pull/369#discussion_r1053853546 https://github.com/WebAssembly/wasi-threads/pull/19#discussion_r1061484551 https://github.com/WebAssembly/WASI/pull/48#discussion_r289338186