SpringBoot Add manifest entry to indicate that a jar has been built for native image

When a Spring Boot jar has been built for use in a native image, an entry named Spring-Boot-Native-Processed with a value of true should be added to the META-INF/MANIFEST.MF file. This indicates that the jar has been AOT processed, the GraalVM reachability metadata is enabled, and reachability metadata has been copied to the jar. Tooling such as Cloud Native Buildpacks can use this manifest attribute to make decisions about whether to package the application as a native executable.

This attribute will be absent from the manifest if the jar has not been prepared for use in a native image.

Comment From: scottfrederick

Closed with 23ae91b008d456775e91b9f3d508688e4da9fe85