They're not controlling anything by releasing open-source libraries/languages such as gRPC, Kubernetes and Go. Releasing these things don't give them control over anything that can negatively impact users; this is not Microsoft's embrace-and-extend.

Chrome, on the other hand, is worth worrying about. Unlike the other technologies you mention, it's a consumer application that legitimately lets Google apply Microsoft-style embrace-and-extend tactics, monopolizing the web and steering it in a direction that benefits Google more than anything (e.g. ads and tracking).

Kubernetes may have come out of Google, but it isn't even in their control anymore. If anything, Kubernetes is a strategic play to democratize cloud orchestration, undermining competitors such as AWS.