Fix `cedar-java-hello-world` build for versions >2.3

[khieta]

Category

cedar-java-hello-world

Describe the expansion you'd like to request

Currently the documentation says that the Java example only works with cedar-java version 2.3.x, and the CI only tests this version (for all branches).

1. The most recently release version of cedar-java on Maven (at time of writing) is 3.1.2, so the build instructions should be updated to account for this
2. The CI in this repository should be updated to support testing a specified version of cedar-java, like we do for our other examples (e.g., see build_tiny_todo_reusable.yml)
3. The CI in cedar-policy/cedar-java should be updated to build cedar-java-hello-world as a downstream dependency

Additional context

No response

Is this something that you'd be interested in working on?

• 👋 I may be able to implement this feature request
• ⚠️ This feature might incur a breaking change

[mark-creamer-amazon]

1. The most recently release version of cedar-java on Maven (at time of writing) is 3.1.2, so the build instructions should be updated to account for this

#170 is merged, and item 1 is complete.

I believe we should backport the changes for 3.1.x as well.

2. The CI in this repository should be updated to support testing a specified version of cedar-java, like we do for our other examples (e.g., see build_tiny_todo_reusable.yml)

I'll work on this next.

[mark-creamer-amazon]

2. The CI in this repository should be updated to support testing a specified version of cedar-java, like we do for our other examples (e.g., see build_tiny_todo_reusable.yml)

#173 is merged, and item 2 is complete.

[mark-creamer-amazon]

Backported for release/3.1.x: #174.

Going to make the changes for main next.