Google never pushed Go, the UNIX/Plan 9 and Oberon folks did, as means to avoid doing C++, with support of their line managers as their 20% project.

Kubernetes was originally written in Java, and Docker in Python, it was thanks to early Go advocacy, that those projects got rewritten in Go, and then they got lucky.

Just like the download server rewrite into Go, that was done by someone from Go team, as part of their advocacy.

Check how many public projects does Google do, outside anything related to CNCF project landscape.