Add support for specifying formatter config (#235)

[felixzheng98]

Issue #, if available:

Description of changes:

• Backport of https://github.com/cedar-policy/cedar-java/pull/235 to release/3.4.x

[felixzheng98]

Looks like CI is failing due to this not being backported to release branches:

• https://github.com/cedar-policy/cedar-java/pull/163

[felixzheng98]

If there are no concerns with the CI, please merge when convenient as I don't have permission to merge.

Thank you!