Disable `main_needs_argc_argv` for Wasm
AFAIU this explains to the "Rust Runtime" that `main()` doesn't need `argc`/`argv`. Newer Wasm targets have explicitly disabled this, this PR changes it so that the base Wasm configuration affecting all Wasm targets disables this now.
This affects the following targets:
- `wasm32-unknown-unknown`
- `wasm32v1-none`
- `wasm64-unknown-unknown`
The only Wasm target where `main_needs_argc_argv` is still enabled is `wasm32-unknown-emscripten`. @hoodmane let me know and I can remove it there as well.
Credit goes to @Spxg for stumbling on this.
r? @alexcrichton
Jonathan Brouwer
e34cec62bb