docs: Serverless Workers - Go SDK pages (2/4)

Add Go SDK Serverless Workers documentation including the lambdaworker
package guide for AWS Lambda, rewrite run-worker-process to focus on
long-lived Workers, and remove cloud-worker (content folded in).
Update sidebars, add redirect, and set broken links to warn for
cross-PR references.

Part of #4405.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: lennessyy

docs/develop/go/index.mdx

@@ -66,9 +66,9 @@ Execute Activities independently without a Workflow using the Temporal Client.
 
 ## [Workers](/develop/go/workers)
 
-- [Worker processes](/develop/go/workers/run-worker-process)
-- [Cloud Worker](/develop/go/workers/cloud-worker)
+- [Run a Worker](/develop/go/workers/run-worker-process)
 - [Sessions](/develop/go/workers/sessions)
+- [Serverless Workers](/develop/go/workers/serverless-workers)
 
 ## [Temporal Client](/develop/go/client)
 

docs/develop/go/workers/cloud-worker.mdx

@@ -17,6 +17,6 @@ import * as Components from '@site/src/components';
 
 ## Workers
 
-- [Worker processes](/develop/go/workers/run-worker-process)
-- [Cloud Worker](/develop/go/workers/cloud-worker)
-- [Sessions](/develop/go/workers/sessions)
+- [Run a Worker](/develop/go/workers/run-worker-process)
+- [Sessions](/develop/go/workers/sessions)
+- [Serverless Workers](/develop/go/workers/serverless-workers)