Promote Transform Processor to `Stable`

[edmocosta]

Component(s)

processor/transform

Describe the issue you're reporting

The Collector SIG has documented what "Stable" means at the component-stability doc. We need to ensure that the Transform Processor comply with all requirements:

• Promote Transform Processor to Stable - Config
• Promote Transform Processor to Stable - Testing
• Promote Transform Processor to Stable - Documentation
• Promote Transform Processor to Stable - Observability

---

Besides the clear work outlined by the guide towards stable components, there's extra work that needs to be done:

• [processor/transform] Change default error_mode to ignore #47231

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[github-actions]

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