Vertx should build its virtual thread factory at runtime with correct reflection calls #5169
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A Vertx uses cached reflection to build the virtual thread factory in order to remain compatible with Java 8. When running in a native image Vert.x will assume that the runtime might not have virtual thread incorrectly.
Defer the virtual thread factory availability when a Vertx instance is created, in addition declares that virtual thread factory API should not be cached so the Vertx instance is able to build the virtual thread factory correctly.
Native image metadata are held in the native-image classifier jar since this is experimental and might collide with existing solution for managing native image where framework is embedded.