Use WasmFeature::all to support every feature by default in wasm-tools component new

[anlavandier]

Closes #2310

This PR adds a --features argument to wasm-tools component new using the model of wasm-tools validate. This is done by parsing the --features arguments and propagating the features down to ValidatedModule::new which is the function responsible for initializing the Validator used when parsing the provided Wasm Module

This PR enables all of the features supported by wasm-tools in the Validator used when parsing the provided Wasm Module in wasm-tools component new

This PR is trying to be as targeted as possible but I would argue that --features should be a argument global to wasm-tools and forwarded to every validator used when parsing .wasm modules.

[alexcrichton]

Thanks for the PR! In situations like this thought I've often found it easiest to avoid passing features around and instead just turn on all the features. That way it's a bit easier since there's much less plumbing and it's not really less-wrong since wasm-tools component new isn't really a load-bearing validation function anyway. What do you think about that approach instead?

[anlavandier]

I'm completely fine with this. I'll change the PR title, comment and code to reflect this. Once this is merged, will this directly affect newer releases of wasm-component-ld or will a similar PR need to be raised in that repo as well ?

[alexcrichton]

To update wasm-component-ld the process is (a) merge the PR here, (b) make a crates.io release from this repo, (c) update the wasm-component-ld source, (d) make a crates.io release of wasm-component-ld, and (e) update rust-lang/rust and wasi-sdk to the new versions. I'm able to help out with these parts too and it's fine to make a release for this.

Would you be up for adding a test here as well? For example something in crates/wit-component/tests/components I think would work. Something small is fine, but it'd be good to verify that everything works with a proposal like custom-page-sizes.

[anlavandier]

Done in the latest commit.