Gradle 9+ support

[Ben Bader]

Hello Jib authors,

We're happy Jib Gradle plugin users, and have been for years.  As time marches on, Gradle has evolved quite a bit, and is on the verge of making its configuration cache non-optional.  Jib does not support this.  We would also like to move to Java 25, which requires Gradle 9.1, also not currently supported by Jib.

Are there plans to add such support?

Thanks,

Ben