[golanci.yaml.tmpl] disable modernize omitzero plugin with controllergen

This plugin is breaking practically all kubernetes-operators that have
CRDs. The CRDs are generated from golang types, where the omitempty tag
for nested structs has an direct effect on the generated CRD - they just
don't work without omitempty.

```
  Error: api/v1/eviction_types.go:91:20: omitzero: Omitempty has no
  effect on nested struct fields (modernize)
```

Author: notandy

internal/golangcilint/golangci.yaml.tmpl

@@ -154,6 +154,12 @@ linters:
       enable-all: true
     nolintlint:
       require-specific: true
+    {{- if .WithControllerGen }}
+    modernize:
+      disable:
+        # omitzero requires removing omitempty tags in kubernetes api struct types which are nested, which is intepreted by controller-gen and breaks the CRDs.
+        - omitzero
+    {{- end }}
     {{- if .MisspellIgnoreWords }}
     misspell:
       ignore-rules:

internal/golangcilint/golangci_lint.go

@@ -36,5 +36,6 @@ func RenderConfig(cfg core.Configuration, sr golang.ScanResult) {
 		"SkipDirs":            cfg.GolangciLint.SkipDirs,
 		"Timeout":             timeout,
 		"ReviveRules":         cfg.GolangciLint.ReviveRules,
+		"WithControllerGen":   cfg.ControllerGen.Enabled.UnwrapOr(sr.KubernetesController),
 	}))
 }