CI: Update to Windows 2025 with VS 2026

This will also allow us to move to clang-format 22 which ships with
VS 2026.

 * Update the CI image to windows-2025-vs2026
 * Update VS generator to 2026
 * Update Windows SDK to 26100

.github/workflows/analyze-project.yaml

@@ -4,7 +4,7 @@ on:
 jobs:
   windows:
     name: Windows 🪟 (PVS-Studio)
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     if: false && github.repository_owner == 'obsproject'
     defaults:
       run:

.github/workflows/build-project.yaml

@@ -379,7 +379,7 @@ jobs:
     strategy:
       matrix:
         architecture: [x64, arm64]
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     needs: check-event
     defaults:
       run:

.github/workflows/dispatch.yaml

@@ -139,7 +139,7 @@ jobs:
   windows-patches:
     name: Create Windows Patches 🩹
     if: github.repository_owner == 'obsproject' && inputs.job == 'patches'
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: ./.github/actions/windows-patches

.github/workflows/publish.yaml

@@ -246,7 +246,7 @@ jobs:
     name: Create Windows Patches 🩹
     needs: check-tag
     if: github.repository_owner == 'obsproject' && fromJSON(needs.check-tag.outputs.validTag)
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: ./.github/actions/windows-patches

.github/workflows/sign-windows.yaml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         architecture: [x64, arm64]
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     environment:
       name: bouf
     defaults: