Upgrade to elasticsearch 8.

[mcollina]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the feature has not already been requested

🚀 Feature Proposal

ElasticSearch 8 now requires https for every communication. This makes the current approach we use for running tests moot.

We need some new setup and I do not have time to look into it right now.

@delvedor can you help?

Motivation

No response

Example

No response

[delvedor]

ElasticSearch 8 now requires https for every communication.

This isn't entirely true, it requires https by default, but it can be disabled with --env "xpack.security.enabled=false".

Otherwise, we can migrate to elastic/elastic-github-actions, which has been updated to better support security on by default.
While testing the code should either avoid rejecting unauthorized certs, or set security-enabled: false in the action settings.

[mcollina]

Both are valid approaches. We need both an update to https://github.com/fastify/fastify-elasticsearch/blob/master/es-docker.sh and to the action.