support mix of launcherType in version overrides

[bishabosha]

needed for scala/scala3#20098 and VirtusLab/scala-cli#2838

enable a mixture of launcherType in version overrides, this allows to have a prebuilt scala launcher for 3.5.0+, and then bootstrap launcher for anything below to preserve backwards compatibility.

here is the proposed new scala.json app descriptor:

{
  "repositories": [
    "central"
  ],
  "dependencies": [
    "org.scala-lang:scala3-compiler_3:latest.stable"
  ],
  "name": "scala",
  "properties": {
    "scala.usejavacp": "true"
  },
  "versionOverrides": [
    {
      "versionRange": "(3.4.max,)",
      "launcherType": "prebuilt",
      "prebuilt": "zip+https://github.com/scala/scala3/releases/download/${version}/scala3-${version}.zip!scala3-${version}/bin/scala"
    },
    {
      "versionRange": "[3.1.0,3.4.max]",
      "mainClass": "dotty.tools.MainGenericRunner"
    },
    {
      "versionRange": "[3.0.0,3.0.2]",
      "mainClass": "dotty.tools.repl.Main"
    },
    {
      "versionRange": "(,2.max]",
      "dependencies": [
        "org.scala-lang:scala-compiler:latest.stable"
      ],
      "mainClass": "scala.tools.nsc.MainGenericRunner"
    }
  ]
}

we would actually have to update this app descriptor again when we want a true native launcher built by graalvm - but version overrides support that already.

cc/ @adpi2 @tgodzik @kasiaMarek @Gedochao @hamzaremmal

[bishabosha]

Everyone involved, I added a field to AppDescriptor so I guess we should have a new minor release I put 2.2.0 in the since annotation, but is that right?

[adpi2]

LGTM

[bishabosha]

CI only fails due to macOS runner being arm64 - #2974

[alexarchambault]

Everyone involved, I added a field to AppDescriptor so I guess we should have a new minor release I put 2.2.0 in the since annotation, but is that right?

Precisely, the @since annotation allows not to break binary compatibility upon field addition

[bishabosha]

I use currentOs here because if ran from e.g. macOS then the Mac-formatted path will actually be in the launcher.

[tgodzik]

LGTM from me, since it's needed for Scala CLI as Scala I am going to merge it and work on a release. Hopefully, this is not an issue @alexarchambault ?

Thanks @bishabosha !