Change: [CI] Use Azure Code Signing for Windows build

os/windows/sign_azure.ps1

@@ -0,0 +1,40 @@
+# Signing script for Azure Code Signing
+# Arguments: sign_azure.ps1 path_to_sign
+#
+# Environment variables must be set up before use:
+#
+# AZURE_TENANT_ID
+# AZURE_CLIENT_ID
+# AZURE_CLIENT_SECRET
+# AZURE_CODESIGN_ACCOUNT_NAME
+# AZURE_CODESIGN_ENDPOINT
+# AZURE_CODESIGN_PROFILE_NAME
+
+Param
+(
+    # Files folder
+    [Parameter(Mandatory=$true, Position=0)]
+    $FilesFolder
+)
+
+if (!$Env:AZURE_CODESIGN_ENDPOINT -or !$Env:AZURE_CODESIGN_ACCOUNT_NAME -or !$Env:AZURE_CODESIGN_PROFILE_NAME -or
+	!$Env:AZURE_TENANT_ID -or !$Env:AZURE_CLIENT_ID -or !$Env:AZURE_CLIENT_SECRET)
+{
+	"Code signing variables not found; most likely running in a fork. Skipping signing."
+	exit
+}
+
+Install-Module -Name AzureCodeSigning -Scope CurrentUser -RequiredVersion 0.3.0 -Force -Repository PSGallery
+
+$params = @{}
+
+$params["Endpoint"] = $Env:AZURE_CODESIGN_ENDPOINT
+$params["CodeSigningAccountName"] = $Env:AZURE_CODESIGN_ACCOUNT_NAME
+$params["CertificateProfileName"] = $Env:AZURE_CODESIGN_PROFILE_NAME
+$params["FilesFolder"] = $FilesFolder
+$params["FilesFolderFilter"] = "exe"
+$params["FileDigest"] = "SHA256"
+$params["TimestampRfc3161"] = "http://timestamp.acs.microsoft.com"
+$params["TimestampDigest"] = "SHA256"
+
+Invoke-AzureCodeSigning @params