Support platform build args like `linux:--gc=G1`

[rbygrave]

Is your feature request related to a problem?

Some build args are only supported on certain platforms like --gc=G1 is supported on linux but not macos.

This forces apps using native-maven-plugin , that want to build on multiple platforms to use maven profiles to override the build args. Although this works:

• it is fairly verbose solution
• means a lot of build args are copy n paste to multiple locations.

Describe the solution you'd like
I'd like to be able to use platform prefixes like linux:, macos:, windows: with build args such that they are then only applied and used if the current build platform matches the prefix.

Example:

<buildArgs>
    <buildArg>linux:--gc=G1</buildArg>                   <!-- only use on linux-->
    <buildArg>linux:-R:MaxGCPauseMillis=50</buildArg>   <!-- only use on linux-->
    <buildArg>-R:MaxHeapSize=400m</buildArg>
    <buildArg>--emit build-report</buildArg>
    <buildArg>--no-fallback</buildArg>
    <buildArg>-march=compatibility</buildArg>
    <buildArg>--allow-incomplete-classpath</buildArg>
    <buildArg>--static-nolibc</buildArg>
</buildArgs>

Describe alternatives you've considered
The current maven approach is to use maven profiles like:

        <profile>
            <id>mac</id>
            <activation>
                <os>
                    <family>mac</family>
                </os>
            </activation>
          <!-- specify the buildArgs for mac -->

... which has the 2 issues of being verbose and introducing a decent amount of copy n paste.

Another approach would involve changing the xml schema in order to group build args by platform
like the linuxBuildArgs element below:

<configuration>
    <linuxBuildArgs>
        <buildArg>--gc=G1</buildArg>
        <buildArg>-R:MaxGCPauseMillis=50</buildArg>
    </linuxBuildArgs>
    <buildArgs>
        <buildArg>-R:MaxHeapSize=400m</buildArg>
        <buildArg>--emit build-report</buildArg>
        <buildArg>--no-fallback</buildArg>
        <buildArg>-march=compatibility</buildArg>
        <buildArg>--allow-incomplete-classpath</buildArg>
        <buildArg>--static-nolibc</buildArg>
    </buildArgs>
</configuration>

Additional context
Often we have the situation where we have developers building locally (using say macos)
and a CICD build pipeline on linux.

We want the local developer build on macos to work and we are mostly just looking to
filter out the [linux] platform specific args.