Merge branch 'vendor_kubeclient_temporarily' into 'master'

Vendors kubeclient gem

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/107171



Merged-by: Sean Arnold <sarnold@gitlab.com>
Approved-by: Peter Leitzen <pleitzen@gitlab.com>
Approved-by: Hunter Stewart <hustewart@gitlab.com>
Approved-by: Sean Arnold <sarnold@gitlab.com>
Co-authored-by: Thong Kuah <tkuah@gitlab.com>