Implement ServerReadinessRules (#928)

* Add `ServerReadinessRule` resource
* Add `ServerReadinessRule` controller
  * Continuous & bootstrap only mode
* Add test cases

Signed-off-by: Axel Christ <axel.christ@sap.com>

Author: adracus

PROJECT

@@ -163,4 +163,12 @@ resources:
   kind: BMCSettingsSet
   path: github.com/ironcore-dev/metal-operator/api/v1alpha1
   version: v1alpha1
+- api:
+    crdVersion: v1
+  controller: true
+  domain: ironcore.dev
+  group: metal
+  kind: ServerReadinessRule
+  path: github.com/ironcore-dev/metal-operator/api/v1alpha1
+  version: v1alpha1
 version: "3"