chore(docs): stackpack release 8.16.6 and 8.17.4

[gersonsosa]

Update docs for releases 8.16.6 and 8.17.4 for ece.

• https://github.com/elastic/cloud/issues/138947
• https://github.com/elastic/cloud/issues/138946

[gigerdo]

It looks like these docs now combine the ECE docs (used to be in the cloud repo) as well as the general download pages (used to be in cloud-assets).

The general rule is:

• Anything related to ECE installation/offline setup should reference the versions installed in ECE. 8.17.3, 8.18.0, 9.0.0 currently for 4.0
• Anywhere it lists all existing versions, the new 8.17.4/8.16.6 can be added

@florent-leborgne just wanted to get your input as well: Is there any other place we have to update when releasing new stack versions? There also used to be an ECH doc that we updated.

(Also should we actually still update the ECH version in cloud repo for now until these docs here are live?)

[gigerdo]

This part here should be replaced with the versions from ECE 4.0:
https://github.com/elastic/cloud/blob/ms-122/scala-services/bootstrap/src/main/resources/reference-versions.conf

8.17.3, 8.18.0, 9.0.0

[gersonsosa]

ah good point, I mixed the stack pack release and the ECE release, so 8.17.4 will not be in the ECE 4.0 release? or we should update it there to include it here?

[gigerdo]

Yeah we could actually update ECE 4 to include 8.17.4. It would mean updating the reference-versions on ms-122 as well.

[gigerdo]

These should also be the ECE images 8.17.3, 8.18.0, 9.0.0

[gigerdo]

These documents mention 3.8 everywhere, could be the time to do a quick search-replace for 4.0

[florent-leborgne]

@gigerdo yes.

• this repo is for ECE docs 4.0 and above, and for Elastic Cloud Hosted from ms-122 (you're right we'll update all ECE "3.8.1" into 4.0.0 this week)
• docs for previous versions of ECE will still use the old asciidoc-based mechanisms, in case they also need updating (3.8, 3.7...) and are in their respective cloud branches
• for Elastic Clouds Hosted, ms-122 will also be published from the cloud repo because the docs here will only go live on April 2nd with stack 9.0

That means that currently we're a bit in a dual state where we need to update both /cloud and docs-content repos depending on the docs version we need to update.

I'm happy to hop on a call to clarify anything if it can help, and also help update any internal process docs.

Cc @eedugon as he's the one who initially worked on migrating these files.

[gigerdo]

I think it makes sense to just consider this more of an ECE 4 PR and update everything so it fits for the ECE 4 release.

for Elastic Clouds Hosted, ms-122 will also be published from the cloud repo because the docs here will only go live on April 2nd with stack 9.0

OK I see, so for the 8.17.4 release we would still have to update this file in ms-122: https://github.com/elastic/cloud/blob/ms-122/docs/shared/ec-ech-cloud-versions.asciidoc

[gersonsosa]

@gigerdo I'm going to create a new PR with another branch name but picking the changes from here that makes sense ty!

[gersonsosa]

Here's the new PR still a WIP #972