Support new GraalVM for JDK17/JDK20 release

This commit adds support for the new GraalVM for JDK17/JDK20 release, including the new Oracle GraalVM distribution.
For this, users only need to specify the 'java-version' option and the new 'distribution' option.
The 'version' option is now marked as optional and kept for compatibility with older GraalVM releases and Mandrel.

src/features/reports.ts

@@ -88,6 +88,7 @@ export async function setUpNativeImageBuildReports(
   const isSupported =
     graalVMVersion === c.VERSION_LATEST ||
     graalVMVersion === c.VERSION_DEV ||
+    graalVMVersion.length === 0 ||
     (!graalVMVersion.startsWith(c.MANDREL_NAMESPACE) &&
       gte(toSemVer(graalVMVersion), '22.2.0'))
   if (!isSupported) {