Migrate to release scripts for documentation publishing

[dreab8]

Fix #2519

[DavideD]

I don't know if this is the right approach.
We already have a task that copies the documentation from one place to another.
It's here:

hibernate-reactive/release/build.gradle

Line 140 in 21a019c

def updateDocumentationTask = tasks.register( 'updateDocumentation' ) {

I'm not sure exactly what we need to do here, but it seems we could just copy the documentation in the right place during the release. RIght?

[dreab8]

Thanks @DavideD for the hint, I have changed the code to use updateDocumentationTask

[DavideD]

If I understand correctly this change shouldn't affect the current build. Can we merge it or there's something else to do?
I'm asking because it's a draft

[marko-bekhta]

right ... you've got a point here 🙂, utill we update the release script, we'd just copy a few extra files somewhere for no reason 🫣 😃
we just wanted to prepare the changes for all projects before merging

[marko-bekhta]

and I think this PR should cover it, in terms of changes to Reactive ...
For the release scripts, we just need the docs to be in the "expected location", and then those should take care of the rest...

things to keep in mind:

• make sure that the directories are created at both doc servers before we try to upload
• update the release script to move doc upload script to be executed for all projects

at some point later we'd need to remove the "github upload" that Reactive was already doing, but that can be a next step once we are happy with the docs.hibernate.org, and we add the redirects to hibernate.org so that the reactive docs would take the user to docs.hibernate.org....