Embedded the Windows app manifest into the Rust test programs (#1071)

runtime/windows-app-manifest.xml

@@ -0,0 +1,19 @@
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+  <!--
+    A copy of src/windows-app-manifest.xml from the crate tauri-build 2.6.3. When you update
+    Tauri, compare this file with the one of the new version and take over any change.
+    build.rs embeds it on Windows into every program, the test programs included.
+  -->
+  <dependency>
+    <dependentAssembly>
+      <assemblyIdentity
+        type="win32"
+        name="Microsoft.Windows.Common-Controls"
+        version="6.0.0.0"
+        processorArchitecture="*"
+        publicKeyToken="6595b64144ccf1df"
+        language="*"
+      />
+    </dependentAssembly>
+  </dependency>
+</assembly>