Run mingw64 and cygwin tests on latest Windows Server

Author: Leont

.github/workflows/testsuite.yml

@@ -515,7 +515,7 @@ jobs:
 
   mingw64:
     name: "Windows mingw64"
-    runs-on: windows-2019
+    runs-on: windows-2025
     timeout-minutes: 120
     needs: sanity_check
     if: (! cancelled() && (needs.sanity_check.outputs.run_all_jobs == 'true' || needs.sanity_check.outputs.ci_force_mingw64 == 'true'))
@@ -566,7 +566,7 @@ jobs:
 
   cygwin:
     name: "cygwin"
-    runs-on: windows-2019
+    runs-on: windows-2025
     timeout-minutes: 120
     needs: sanity_check
     if: (! cancelled() && (needs.sanity_check.outputs.run_all_jobs == 'true' || needs.sanity_check.outputs.ci_force_cygwin == 'true'))