Update python Docker tag to v3.13

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Author: red-hat-konflux[bot]

cmd/initializer_v2/dataset/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.11-alpine
+FROM python:3.13-alpine
 
 WORKDIR /workspace
 

cmd/initializer_v2/model/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.11-alpine
+FROM python:3.13-alpine
 
 WORKDIR /workspace
 

sdk/python/Dockerfile.conformance

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # Dockerfile for building the source code of conformance tests
-FROM python:3.10-alpine
+FROM python:3.13-alpine
 
 WORKDIR /kubeflow/training-operator/sdk/python
 

sdk/python/kubeflow/storage_initializer/Dockerfile

@@ -1,5 +1,5 @@
 # Use an official Python runtime as a parent image
-FROM python:3.11
+FROM python:3.13
 
 # Set the working directory in the container
 WORKDIR /app

sdk/python/kubeflow/trainer/Dockerfile.cpu

@@ -1,5 +1,5 @@
 # Use an official Python runtime as a parent image
-FROM python:3.11
+FROM python:3.13
 
 # Set the working directory in the container
 WORKDIR /app