Improve Vert.x support (Generator + Enricher)

[manusa]

Description

Current Vert.x support implementation works with io.reactiverse Vert.x Maven Plugin, or with Vanilla Vert.x < 4.

However, when creating a Vert.x application from https://start.vertx.io/ and deploying to Kubernetes, the following error is received:

SEVERE: Failed to create the vert.x instance
java.lang.IllegalStateException: Failed to create cache dir: /tmp-bf04be10-bf2a-455f-b49b-c133796d22b2
at io.vertx.core.file.impl.FileCache.setupCacheDir(FileCache.java:59)
at io.vertx.core.file.impl.FileCache.setupCache(FileCache.java:29)
at io.vertx.core.file.impl.FileResolver.(FileResolver.java:65)
at io.vertx.core.impl.VertxFactory.createFileResolver(VertxFactory.java:164)
at io.vertx.core.impl.VertxFactory.vertx(VertxFactory.java:78)
at io.vertx.core.Vertx.vertx(Vertx.java:86)

• Apparently, adding the following property -Dvertx.disableFileCPResolving=true to the Java Options fixes the issue.

• Modifying the temporary directory location configuration solves the problem.
  In Vert.x v4 there is no subdirectory created, the configuration is used as a prefix instead /tmpbf04be10... as opposed to /tmp/bf04be10... which produced the aforementioned issue.
  Changing this configuration to something like /tmp/vertx-cache fixes the issue and doesn't break compatibility with v3.
  It will also preserves the Cache ClassPath resolution features

• Port inference is something that could be improved too. Still need to find best approach for Vanilla Vert.x projects.

Expected behavior

• Quick start project via https://start.vertx.io/ with Vert.x Web
• Compile and Deploy:

  $ mvn clean package k8s:build k8s:push k8s:resource k8s:apply

• Application is deployed successfully

[manusa]

As for the port inference, there is not an easy way to infer the exposed ports since in many cases ports are assigned programmatically.
There's already some sort of integration with Vert.x Config and properties files that we may need to revisit in the future.