feat: spring-boot.build-image.* should not be read-only

[mpalourdio]

Hi!

With Spring Boot 3.4+, it's now possible to build a docker image from an amd64 host for an arm64 platform. It works and it's awesome!

But while setting the parameter in the pom, or by command line, ie mvn clean -Pnative spring-boot:build-image -Dspring-boot.build-image.imagePlatform=linux/arm64, maven warns :

Parameter 'imagePlatform' (user property 'spring-boot.build-image.imagePlatform') is read-only, must not be used in configuration

IMO, the readonly flag should be removed here

[snicoll]

IMO, the readonly flag should be removed here

If it should be removed there, it should be removed pretty much in every parameter above where we're applying the exact same thing.

[mpalourdio]

Indeed, I have removed it for all the spring-boot.build-image.* parameters. It's convenient to set them via CLI as the javadoc states, ie Alias for {@link Image#XXXX} to support configuration through command-line, and maven 4 may deny this later IIRC.

[snicoll]

Thanks but that would be a breaking change for most users. I've created #43699 to provide more context and we will use this issue to figure out what to do.