Support maven_install.json v2

**Is your feature request related to a problem? Please describe.**
As of version [5.1](https://github.com/bazelbuild/rules_jvm_external/releases/tag/5.1) of `rules_jvm_external`, the `maven_install.json` schema was updated for `v2`. The current implementation in dependency check is compatible with `v0.1.0` but `v2`.

**Describe the solution you'd like**
The `PinnedMavenInstallAnalyzer` should support both `maven_install.json` versions.

**Describe alternatives you've considered**
- Roll back the version of `rules_jvm_external` to pre 5.1. That version is over a year old and a major version behind.
- Do container scanning later in the CI process, which would be slower and potentially less reliable

**Additional context**
Bazel continues to grow in popularity, it seems important to support updates.