Identify duplicate kubernetes section airflow configuration and mark them as deprecated

providers/cncf/kubernetes/provider.yaml

@@ -210,20 +210,29 @@ config:
         type: string
         example: ~
         default: ""
+        deprecated: true
+        deprecation_reason: |
+          This configuration is deprecated. Use `pod_template_file` to specify container image instead.
       worker_container_tag:
         description: |
           The tag of the Kubernetes Image for the Worker to Run
         version_added: ~
         type: string
         example: ~
         default: ""
+        deprecated: true
+        deprecation_reason: |
+          This configuration is deprecated. Use `pod_template_file` to specify the image tag instead.
       namespace:
         description: |
           The Kubernetes namespace where airflow workers should be created. Defaults to ``default``
         version_added: ~
         type: string
         example: ~
         default: "default"
+        deprecated: true
+        deprecation_reason: |
+          This configuration is deprecated. Use `pod_template_file` to specify namespace instead.
       delete_worker_pods:
         description: |
           If True, all worker pods will be deleted upon termination

providers/cncf/kubernetes/src/airflow/providers/cncf/kubernetes/get_provider_info.py

@@ -135,20 +135,26 @@ def get_provider_info():
                         "type": "string",
                         "example": None,
                         "default": "",
+                        "deprecated": True,
+                        "deprecation_reason": "This configuration is deprecated. Use `pod_template_file` to specify container image instead.\n",
                     },
                     "worker_container_tag": {
                         "description": "The tag of the Kubernetes Image for the Worker to Run\n",
                         "version_added": None,
                         "type": "string",
                         "example": None,
                         "default": "",
+                        "deprecated": True,
+                        "deprecation_reason": "This configuration is deprecated. Use `pod_template_file` to specify the image tag instead.\n",
                     },
                     "namespace": {
                         "description": "The Kubernetes namespace where airflow workers should be created. Defaults to ``default``\n",
                         "version_added": None,
                         "type": "string",
                         "example": None,
                         "default": "default",
+                        "deprecated": True,
+                        "deprecation_reason": "This configuration is deprecated. Use `pod_template_file` to specify namespace instead.\n",
                     },
                     "delete_worker_pods": {
                         "description": "If True, all worker pods will be deleted upon termination\n",

providers/cncf/kubernetes/src/airflow/providers/cncf/kubernetes/kube_config.py

@@ -16,8 +16,10 @@
 # under the License.
 from __future__ import annotations
 
+import warnings
+
 from airflow.configuration import conf
-from airflow.exceptions import AirflowConfigException
+from airflow.exceptions import AirflowConfigException, AirflowProviderDeprecationWarning
 from airflow.settings import AIRFLOW_HOME
 
 
@@ -53,7 +55,21 @@ def __init__(self):
             self.kubernetes_section, "worker_pods_creation_batch_size"
         )
         self.worker_container_repository = conf.get(self.kubernetes_section, "worker_container_repository")
+        if self.worker_container_repository:
+            warnings.warn(
+                "Configuration 'worker_container_repository' is deprecated. "
+                "Use 'pod_template_file' to specify the container image repository instead.",
+                AirflowProviderDeprecationWarning,
+                stacklevel=2,
+            )
         self.worker_container_tag = conf.get(self.kubernetes_section, "worker_container_tag")
+        if self.worker_container_tag:
+            warnings.warn(
+                "Configuration 'worker_container_tag' is deprecated. "
+                "Use 'pod_template_file' to specify the container image tag instead.",
+                AirflowProviderDeprecationWarning,
+                stacklevel=2,
+            )
         if self.worker_container_repository and self.worker_container_tag:
             self.kube_image = f"{self.worker_container_repository}:{self.worker_container_tag}"
         else:
@@ -64,6 +80,13 @@ def __init__(self):
         # cluster has RBAC enabled, your scheduler may need service account permissions to
         # create, watch, get, and delete pods in this namespace.
         self.kube_namespace = conf.get(self.kubernetes_section, "namespace")
+        if self.kube_namespace and self.kube_namespace != "default":
+            warnings.warn(
+                "Configuration 'namespace' is deprecated. "
+                "Use 'pod_template_file' to specify the namespace instead.",
+                AirflowProviderDeprecationWarning,
+                stacklevel=2,
+            )
         self.multi_namespace_mode = conf.getboolean(self.kubernetes_section, "multi_namespace_mode")
         if self.multi_namespace_mode and conf.get(
             self.kubernetes_section, "multi_namespace_mode_namespace_list"