[fix] Replace deprecated SetupMetrics with SetupMetricsOptions

[hayotbisonai]

What does this PR do?

• Replace deprecated SetupMetrics with SetupMetricsOptions
• Added new helper func generateEphemeralID that generates id for setting up metrics

Why is it important?

Checklist

• I have read and understood the pull request guidelines of this project.
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in ./changelog/fragments using the changelog tool
• I have added an integration test or an E2E test

Disruptive User Impact

How to test this PR locally

Related issues

Questions to ask yourself

• How are we going to support this in production?
• How are we going to measure its adoption?
• How are we going to debug this?
• What are the metrics I should take care of?
• ...

[mergify]

This pull request does not have a backport label. Could you fix it @hayotbisonai? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-./d./d is the label that automatically backports to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b fix/replace-deprecated-setmetrics upstream/fix/replace-deprecated-setmetrics
git merge upstream/main
git push upstream fix/replace-deprecated-setmetrics

[ycombinator]

Let's try leaving out this field? We've done it in other places, e.g. https://github.com/elastic/beats/blob/fe58b38aafa2410ee59c1feeec64fbf5a180f09e/x-pack/libbeat/cmd/instance/receiver.go#L53-L59 or https://github.com/elastic/fleet-server/blob/589cd522193e485b8a3c3958a2b3032569b81a4e/internal/pkg/api/metrics.go#L77-L83

[ebeahan]

Please also add a changelog entry.

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b fix/replace-deprecated-setmetrics upstream/fix/replace-deprecated-setmetrics
git merge upstream/main
git push upstream fix/replace-deprecated-setmetrics

[ebeahan]

@hayotbisonai are you planning to continue with this PR?