Add support for conan lock v2

[houdini91]

In conan 2.x i see there is a requries field listing the packages instead of the graph_lock.

For spec change details see https://github.com/conan-io/tribe/blob/main/design/034-new_lockfiles.md. and https://docs.conan.io/2/tutorial/versioning/lockfiles.html#tutorial-versioning-lockfiles.

Closes #2050
Closes #2462

[houdini91]

The change suggested addes the ConanReference object as the metadata instead of ConanLockEntry, this requires a json schema update.

Do we want to reuse the same metadata structure or define another?

[wagoodman]

Do we want to reuse the same metadata structure or define another?

We should add another similar to what you have done. However, I think we should still make a breaking change:

1. rename the existing pkg.ConanLockEntry to pkg.ConanV1LockEntry
2. rename pkg.ConanReference to pkg.ConanV2LockEntry

this implies a breaking update to the JSON schema.

[houdini91]

@wagoodman @tgerla i think i have addressed your comments.
Can you help me understand how can i regenerate the json schema with updates (probably some script?)

[wagoodman]

@houdini91 to regenerate the JSON schema:

make generate-json-schema

the docs about this is here

I can get this across the finish line today 👍

[wagoodman]

I rebased and made some alterations to help get tests passing, however, I don't have write access. I'll merge this as-is into a feature branch in the repo and get it reviewed in a separate PR (you'll still have attribution in the changelog and this PR 👍 ).