Replace heroku/nodejs-engine with libcnb.rs implementation

[joshwlewis]

This changes heroku/nodejs-engine from a bash based buildpack to a rust and libcnb.rs version.

Most of the functionality stays the same, but there are some notable differences:

• heroku/nodejs-engine no longer installs yarn. The heroku/nodejs-yarn buildpack can install yarn today, and that's the more correct place to install it.
• The Go implementation of the node version resolver has been removed. Instead, I've included a modified version of https://github.com/heroku/resolve-version.rs in a shared rust library here. The shared rust library will be the new home for that functionality. The new resolver leverages the semver-node crate, which has support for Node's flavor of semver.
• heroku/nodejs-engine no longer installs jq and yj. We're now using serde serialization and deserialization and rust types for working with toml and json files.
• heroku/nodejs-yarn and heroku/nodejs-npm now install their ownjq instead of expecting it to be installed by heroku/nodejs-enginge.
• The bash and profile.d implementation of WEB_MEMORY and WEB_CONCURRENCY has been replaced with a rust and exec.d implementation. The new implementation supports cgroups v2.
• heroku/nodejs-engine is now independently usable. Simple node.js apps with an index.js or server.js and no dependencies can be built with heroku/nodejs-engine alone.

Releasing

Because the installation of jq has changed, we need to release the npm and yarn buildpack before releasing the engine buildpack. Suggested release order:

1. heroku/nodejs-npm
2. heroku/nodejs-yarn
3. heroku/nodejs-engine
4. heroku/nodejs
5. heroku/nodejs-function

GUS-W-W-10729118