Bump supported kubernetes from 1.29 to 1.30

[takahiro-yamada]

k8s versions are a bit older, but matches with https://github.com/cybozu-go/meows.

• aqua-installer: https://github.com/aquaproj/aqua-installer/releases
• aqua: https://github.com/aquaproj/aqua/releases
• docker/setup-buildx-action: https://github.com/docker/setup-buildx-action/releases
• docker/login-action: https://github.com/docker/login-action/releases
• go: https://github.com/cybozu/neco-containers/blob/3582b8aa8e62a8f8f2a3913c5aa4d8ede78abe89/golang-all/golang-1.23-jammy/TAG
• placemat: https://github.com/cybozu-go/placemat/releases
• controller-tools: https://github.com/kubernetes-sigs/controller-tools/releases
• kustomize: https://github.com/kubernetes-sigs/kustomize/releases
• envtest k8s:

  k8s:stage0.cybozu-ne.co-stage0.cybozu-ne.co> ./bin/setup-envtest list | grep v1.30
  (available)  v1.30.3  linux/amd64
  (available)  v1.30.2  linux/amd64
  (available)  v1.30.0  linux/amd64

[zoetrope]

LGTM

[zoetrope]

staticcheck fails due to a different version of go.

setup-go uses the go directive in go.mod as the go version.
https://github.com/actions/setup-go?tab=readme-ov-file#getting-go-version-from-the-gomod-file
actions/setup-go#457

Can you use staticcheck included in cybozu/golang image?
https://github.com/cybozu/neco-containers/blob/3582b8aa8e62a8f8f2a3913c5aa4d8ede78abe89/golang-all/golang-1.23-jammy/Dockerfile#L19

[takahiro-yamada]

staticcheck fails due to a different version of go.

setup-go uses the go directive in go.mod as the go version. https://github.com/actions/setup-go?tab=readme-ov-file#getting-go-version-from-the-gomod-file actions/setup-go#457

Can you use staticcheck included in cybozu/golang image? https://github.com/cybozu/neco-containers/blob/3582b8aa8e62a8f8f2a3913c5aa4d8ede78abe89/golang-all/golang-1.23-jammy/Dockerfile#L19

We concluded that it's better to modify the go directive in go.mod to the latest version instead of following the suggested idea. This change is implemented in 8d9cb71 .

[zoetrope]

LGTM