[Enhancement] Move on-demand contract compilation out of unstable.

[ruseinov]

It would be nice to move this out of unstable feature.

It seems to work quite well as seen in: near/near-sdk-rs#1195 . It does end up calculating different Gas depending on the machine/rust version, but that's to be expected with any kind of compilation.

Will take this on soon.

[frol]

This is blocked on getting the reproducible builds feature in cargo-near: near/cargo-near#134, and then we would need to extract that functionality from the CLI into a standalone crate. Currently, it is better to keep compile_project feature under a feature flag since otherwise it pulls in quite a bulk of outdated dependencies.

[ruseinov]

This is blocked on getting the reproducible builds feature in cargo-near: near/cargo-near#134, and then we would need to extract that functionality from the CLI into a standalone crate. Currently, it is better to keep compile_project feature under a feature flag since otherwise it pulls in quite a bulk of outdated dependencies.

Let's keep it in the backlog for now then!