[Task]: Switch to Node 22 across all our repos

[diox]

Description

We are currently using Node 20, EOL is 2026-04-30. Let's switch to Node 22 everywhere.

Acceptance Criteria

• addons-server (used for building, but also to run addons-linter)
• addons-frontend
• addons-customs-scanner
• addons-blog (just used for building)
• extension-workshop (just used for building)
• addons-linter
• eslint-config-amo
• eslint-plugin-amo
• addons-scanner-utils

┆Issue is synchronized with this Jira Task