[Synthetics] Upgrade Nodejs to v22.22.2

[mcapell]

Proposed commit message

Upgrade NodeJS version to v22.22.2 on heartbeat

Checklist

• 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. Where relevant, I have used the stresstest.sh script to run them under stress conditions and race detector to verify their stability.
• I have added an entry in ./changelog/fragments using the changelog tool.

Disruptive User Impact

Author's Checklist

• [ ]

How to test this PR locally

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[github-actions]

🤖 GitHub comments

Just comment with:

• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

Pinging @elastic/obs-ds-hosted-services (Team:obs-ds-hosted-services)

[mergify]

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @mcapell? 🙏.
For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-8./d is the label to automatically backport 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.

[coderabbitai]

📝 Walkthrough

Walkthrough

The pull request upgrades Node.js to version 22.22.2 across the heartbeat component. Changes include a new changelog fragment documenting the dependency upgrade and modifications to the Dockerfile template. The Wolfi-based setup stage updates nodejs-22 from 22.22.0-r0 to 22.22.2-r0 and npm from 11.4.2-r1 to 11.12.0-r1. The ubi9-minimal stage updates the NODE_VERSION environment variable from 22.22.0 to 22.22.2. These changes align the pinned versions used during Docker image builds.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

• 🛠️ Update Documentation: Commit on current branch
• 🛠️ Update Documentation: Create PR

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@dev-tools/packaging/templates/docker/Dockerfile.tmpl`:
- Line 136: The Dockerfile template pins Node.js to 22.22.2
(nodejs-22=22.22.2-r0) but CI pipelines still pin 22.20.0 via
ASDF_NODEJS_VERSION and NODEJS_VERSION; update the CI variable values to match
the Dockerfile or alternatively downgrade the Dockerfile pin to 22.20.0 so all
environments align. Locate the apk add line with nodejs-22=22.22.2-r0 and the CI
variables ASDF_NODEJS_VERSION and NODEJS_VERSION in your pipeline configs and
make them consistent (same major/minor/patch), then run CI to confirm no
runtime/test divergence.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 64b52d4b-461d-4571-b5cd-42b565b9d4d2

📥 Commits

Reviewing files that changed from the base of the PR and between 5c83897 and 52c9429.

📒 Files selected for processing (2)

• changelog/fragments/1774969420-dependency-upgrade-nodejs-v22.22.2.yaml
• dev-tools/packaging/templates/docker/Dockerfile.tmpl

[github-actions]

@Mergifyio backport 8.19 9.2 9.3

[mergify]

backport 8.19 9.2 9.3

✅ Backports have been created

Details

• #49822 [8.19](backport #49815) [Synthetics] Upgrade Nodejs to v22.22.2 has been created for branch 8.19
• #49823 [9.2](backport #49815) [Synthetics] Upgrade Nodejs to v22.22.2 has been created for branch 9.2
• #49824 [9.3](backport #49815) [Synthetics] Upgrade Nodejs to v22.22.2 has been created for branch 9.3