Update resolve_version to support both inventory formats

[mlarraz]

First step at addressing https://github.com/heroku/buildpacks-nodejs/issues/938

This preserves the existing script's behavior while also allowing it to read the newer Inventory format from heroku_inventory_utils as used in https://github.com/heroku/buildpacks-nodejs/blob/main/buildpacks/nodejs-engine/src/main.rs.

I also added a more detailed error message for when no resolution is found, listing the requirements as well as target OS and arch.

[mlarraz]

Updated to incorporate changes from https://github.com/heroku/buildpacks-nodejs/pull/926

[colincasey]

Going to mark this as a draft for now due to the reasons mentioned in https://github.com/heroku/heroku-buildpack-nodejs/pull/1321#issuecomment-2688044634. Will need to revisit at a later date but, for now, there is no bandwidth for these changes.

[colincasey]

Closing this as unplanned.