The compatibility of Slime with Kubernetes

[cywang1905]

Update (2022.11.14)

Slime is compatible with the newest Kubernetes now, related pr #197.

Update (2022.03.30)

The latest version of Kubernetes that Slime is compatible with is 1.21, due to the change in CRD's ApiVersion policy in Kubernetes 1.22.
We will make Slime compatible with Kubernetes 1.22+.

[kevinyangI]

The latest version of Kubernetes is 1.25, but the latest version of Kubernetes that Slime is compatible with is just 1.21. We are urgently hoping that Slime can support 1.23+.