Use an inventory file for OpenJDK distribution files

[Malax]

Inventory File

This PR uses https://github.com/malax/inventory for handling inventory files in a generic manner. That crate still needs some polish, but is usable in the current state. I'd like to get this PR merged before we finalize https://github.com/malax/inventory. The code in that crate is based on the work @runesoerensen did for the Go buildpack, so it's already in production regardless of this PR.

Inventory File Contents (41% of lines added in this PR)

The contents of the inventory file uses a new S3 bucket instead of the existing one. We plan to migrate all JVM buildpacks (CNB and classic) to this bucket eventually.

OpenJDK version parsing (27% of lines added in this PR)

OpenJDK version parsing for both "legacy" version strings used by OpenJDK 8 and JEP 322 version strings (used by OpenJDK >= 10). Support for JEP 223 strings is not implemented since all OpenJDK versions that use that versioning format are already EOL.

I tried implementing the parsing using only std, but the complexity of the spec as well as supporting two slightly overlapping specs made me using nom for parsing.

Deliberately Omitted

• Checksum validation after OpenJDK download (Validate downloaded OpenJDK checksum #667)
• Error message overhaul, including more details around available versions (for which we now have the data)
• ARM64 support

Fixes #499