Add ArgoCD sync option server-side apply for CRDs

This prevents sync errors when the last-applied-configuration
annotation becomes too big.

class/backup-k8up.yml

@@ -15,9 +15,9 @@ parameters:
         input_type: jsonnet
         output_path: apps/
       - input_paths:
-          - backup-k8up/crds/${backup_k8up:images:k8up:tag}/
+          - backup-k8up/component/crds.jsonnet
         output_path: ${_instance}
-        input_type: copy
+        input_type: jsonnet
         output_type: yaml
       - output_path: ${_instance}/01_k8up_helmchart
         input_type: helm

component/crds.jsonnet

@@ -0,0 +1,25 @@
+local kap = import 'lib/kapitan.libjsonnet';
+local kube = import 'lib/kube.libjsonnet';
+local prometheus = import 'lib/prometheus.libsonnet';
+local inv = kap.inventory();
+local params = inv.parameters.backup_k8up;
+
+local load_crds(name) =
+  std.parseJson(kap.yaml_load_stream(
+    'dependencies/backup-k8up/crds/%s/%s.yaml' % [
+      params.images.k8up.tag,
+      name,
+    ]
+  ));
+
+local syncOptionAnnotation = {
+  metadata+: {
+    annotations+: {
+      'argocd.argoproj.io/sync-options': 'ServerSideApply=true',
+    },
+  },
+};
+
+local crds = [ crd + syncOptionAnnotation for crd in load_crds('02_k8up_crds') ];
+
+{ '02_k8up_crds': crds }