An attempt, with help from https://github.com/pulumi/pulumi-kubernetes,

on starting to deploy java SDK during pre-release, but using
https://github.com/pulumi/pulumi-package-publisher/tree/main to reduce
duplication.

There are a couple open questions:
* I was getting complaints about the tree not being clean when building
  the java version. Not sure why it is different than the other builds.
* Tests are not enabled for java, since I believe it requires writing
  some test like for the other languages. Can take a look, but have not
  yet.

Other notes:
* I've delete master.yml, since it seems unused, and is one less place
  to copy similar logic.
* I've updated prelease.yml and release.yml, but not much on main.yml,
  since it surprised me it did publishing of sdks. Open to discussion on
  what should be in it.

.github/workflows/main.yml

@@ -349,6 +349,7 @@ jobs:
         - python
         - dotnet
         - go
+        # TODO: Add java here. But it needs to have tests to run.
         nodeversion:
         - 14.x
         pythonversion: