Update Windows 10 x86 to version 1909

These are also updated to tier1 image:
msvc 2017: 15.9.21
msvc 2017 build tools: 15.0 (26228.10)
msvc 2019: 16.4.6
msvc 2019 build tools: 16.4.6

Change-Id: I41ae0e287ccf74183438d7a7bff639fd78e86e7a
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>

coin/pre-provisioning/qtci-windows-10-x86/disable-windows-update-medic.ps1

@@ -0,0 +1,25 @@
+# Windows Update Medic Service (WaaSMedicSvc)'PerformRemediation' helps recover update-related services to the supported configuration.
+# WaasMedicSvc keeps re-starting Windows Update, even if it disabled manually.
+# Even Admin user don't have privileged to disable PerformRemediation from Task Scheduler which means that WaaSMedicSvc.dll need's to be removed from the system
+
+$limit = (Get-Date).AddMinutes(20)
+$path = "C:\Windows\System32\WaaSMedicSvc.dll"
+
+DO {
+    takeown /F $path
+    icacls  $path /grant Administrators:f
+    Write-host "Deleting $path"
+
+    Try {
+        del $path
+    }
+    Catch [System.UnauthorizedAccessException] {
+        Write-host "Access to the path '$path' is denied."
+        Continue
+    }
+
+    if ((Get-Date) -gt $limit) {
+        exit 1
+    }
+
+}while (Test-Path -Path "$path")