chore(ci): add Python 3.13 to docker test and release matrices

Expands docker-test, docker-test-lb-cpu, docker-test-gpu, docker-test-lb,
docker-prod-gpu, docker-prod-cpu, docker-prod-lb, and docker-prod-lb-cpu
to include 3.13. is-default stays on 3.12 (drives :latest aliases).

Refs AE-2827.

Author: deanq

.github/workflows/ci.yml

@@ -75,7 +75,7 @@ jobs:
     if: github.event_name != 'pull_request' || github.head_ref != 'release-please--branches--main'
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -107,7 +107,7 @@ jobs:
     if: github.event_name != 'pull_request' || github.head_ref != 'release-please--branches--main'
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -140,7 +140,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
       - name: Clear space
         run: |
@@ -173,7 +173,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
       - name: Clear space
         run: |
@@ -256,6 +256,8 @@ jobs:
             is-default: false
           - python-version: "3.12"
             is-default: true
+          - python-version: "3.13"
+            is-default: false
     steps:
       - name: Clear Space
         run: |
@@ -329,6 +331,8 @@ jobs:
             is-default: false
           - python-version: "3.12"
             is-default: true
+          - python-version: "3.13"
+            is-default: false
     steps:
       - name: Clear Space
         run: |
@@ -402,6 +406,8 @@ jobs:
             is-default: false
           - python-version: "3.12"
             is-default: true
+          - python-version: "3.13"
+            is-default: false
     steps:
       - name: Clear Space
         run: |
@@ -475,6 +481,8 @@ jobs:
             is-default: false
           - python-version: "3.12"
             is-default: true
+          - python-version: "3.13"
+            is-default: false
     steps:
       - name: Clear Space
         run: |