Allow package exclusions and inclusions in javadocs

[vinnybod]

There are times where developers want to exclude specific packages from being generated in the javadocs such as internal code. This is commonly offered as a feature of javadoc generation in both maven and gradle.

An exact package can be provided to remove the first level of files, or a .* to remove all subpackages under it.

java_export(
  ...
  doc_excluded_packages = [
    "com.example.internal.*"
  ]
)

java_export(
  ...
  doc_included_packages = [
    "com.example.processor.*"
  ],
  doc_excluded_packages = [
    "com.example.processor.internal.*"
  ]
)

[vinnybod]

deploy_env gets added back into the docs so we were generating docs for kotlin stdlib which seems wrong. Changed to excluded_workspace to keep it out of the docs, which seems like what was actually intended.
This is also how we handle scala_export in confluent's fork of rules_jvm_external.

[vinnybod]

Hm, only windows is failing. not sure why