Disable nightly features for wasm build

[themighty1]

Currently when building tlsn for wasm targets we are forced to use a nightly compiler due to wasm-bindgen-rayon requiring it (see https://github.com/RReverser/wasm-bindgen-rayon/?tab=readme-ov-file#building-rust-code)

The adverse effect of using the nightly compiler is that it activates experimental features which may cause tlsn dependencies to use those features, making the wasm build susceptible to bugs caused by the experimental features.

The solution is to determine which compiler features are nightly-only and to disable those features for the wasm build.

[danilowhk]

Can I take this issue?

[themighty1]

@danilowhk , hi. We would appreciate if you did.

Let's make sure this is just a research stage. You could look into it and then document the available paths forward in this issue.
We can then address whether or not to take a specific approach separately with other team members.

[danilowhk]

Hey @themighty1 , sounds good! Will do some research on it and share a doc here

[danilowhk]

For tlsn-js it seems that the only dependency requiring nightly is wasm-bindegen-rayon

These are the compiler features that require nightly:

• atomics
• bulk-memory

But currently, it is not possible to compile `wasm-bindgen-rayon without the atomics feature, as it will give a compiler error:
https://github.com/RReverser/wasm-bindgen-rayon/blob/a947bdce8ef1e4b5456b349bd5b3763fe2516e25/src/lib.rs#L20

The recommendation from the wasm-bindgen-rayon library is to use a fixed nightly version, which in this case would be:

nightly-2022-12-12