Drop the windows-2019 runner at is has been phased out

See actions/runner-images#12045.

Replace it with the windows-2022 runner, and the windows-2022 runner
with the windows-2025 runner.

Author: popescu-v

.github/workflows/conda.yml

@@ -78,8 +78,8 @@ jobs:
           - {os: ubuntu-24.04, json-image: '{"image": null}'}
           - {os: ubuntu-22.04, json-image: '{"image": "rockylinux:8"}'}
           - {os: ubuntu-22.04, json-image: '{"image": "rockylinux:9"}'}
-          - {os: windows-2019, json-image: '{"image": null}'}
           - {os: windows-2022, json-image: '{"image": null}'}
+          - {os: windows-2025, json-image: '{"image": null}'}
           - {os: macos-13, json-image: '{"image": null}'}
           - {os: macos-14, json-image: '{"image": null}'}
           - {os: macos-15, json-image: '{"image": null}'}

.github/workflows/tests.yml

@@ -211,7 +211,7 @@ jobs:
             tests/resources/general_options/general_options/*/*._kh
           retention-days: 7
   check-khiops-integration-on-windows:
-    runs-on: windows-2019
+    runs-on: windows-2022
     steps:
       - name: Download the Khiops Desktop NSIS Installer
         shell: pwsh