chore: Update to Go v1.21

- go mod tidy (all modules)
- go work sync
- Fixed plugin generation for Go 1.21
- Updated linting for Go 1.21
- Fixed minecraft example for Helm v3 pull download path
- Update dev docs to mention Go 1.21
- Regenerate plugins with Go 1.21

kyaml/fn/framework/command/command.go

@@ -121,7 +121,7 @@ func AddGenerateDockerfile(cmd *cobra.Command) {
 		Use:  "gen [DIR]",
 		Args: cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			if err := os.WriteFile(filepath.Join(args[0], "Dockerfile"), []byte(`FROM golang:1.20-alpine as builder
+			if err := os.WriteFile(filepath.Join(args[0], "Dockerfile"), []byte(`FROM golang:1.21-alpine as builder
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY go.mod go.sum ./

kyaml/fn/framework/command/command_test.go

@@ -41,7 +41,7 @@ func TestCommand_dockerfile(t *testing.T) {
 		t.FailNow()
 	}
 
-	expected := `FROM golang:1.20-alpine as builder
+	expected := `FROM golang:1.21-alpine as builder
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY go.mod go.sum ./

kyaml/fn/framework/example/Dockerfile

@@ -1,7 +1,7 @@
 # Copyright 2019 The Kubernetes Authors.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM golang:1.20-bullseye
+FROM golang:1.21-bullseye
 ENV CGO_ENABLED=0
 WORKDIR /go/src/
 COPY . .

kyaml/go.mod

@@ -1,6 +1,6 @@
 module sigs.k8s.io/kustomize/kyaml
 
-go 1.20
+go 1.21
 
 require (
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc

kyaml/go.sum

@@ -96,5 +96,6 @@ k8s.io/kube-openapi v0.0.0-20230601164746-7562a1006961/go.mod h1:l8HTwL5fqnlns4j
 k8s.io/utils v0.0.0-20230505201702-9f6742963106 h1:EObNQ3TW2D+WptiYXlApGNLVy0zm/JIBVY9i+M4wpAU=
 k8s.io/utils v0.0.0-20230505201702-9f6742963106/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
+sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
 sigs.k8s.io/yaml v1.4.0 h1:Mk1wCc2gy/F0THH0TAp1QYyJNzRm2KCLy3o5ASXVI5E=
 sigs.k8s.io/yaml v1.4.0/go.mod h1:Ejl7/uTz7PSA4eKMyQCUTnhZYNmLIl+5c2lQPGR2BPY=