Add a magic incantation to tell the Store we support Server (#16306)

I find it somewhat silly that (1) this isn't documented anywhere and (2)
installing the "desktop experience" packages for Server doesn't
automatically add support for the `Windows.Desktop` platform...

Oh well.

I'm going to roll this one out via Preview first, because if the store
blows up on it I would rather it not be during Stable roll-out.

src/cascadia/CascadiaPackage/Package-Can.appxmanifest

@@ -40,6 +40,7 @@
   <Dependencies>
     <!-- rescap:appLicensing only works on 22000+. Until that's fixed, MinVersion will not let people install it on Windows 10... -->
     <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.22000.0" MaxVersionTested="10.0.22621.0" />
+    <TargetDeviceFamily Name="Windows.DesktopServer" MinVersion="10.0.22000.0" MaxVersionTested="10.0.22621.0" />
   </Dependencies>
 
   <Resources>

src/cascadia/CascadiaPackage/Package-Dev.appxmanifest

@@ -39,6 +39,7 @@
 
   <Dependencies>
     <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.19041.0" MaxVersionTested="10.0.22621.0" />
+    <TargetDeviceFamily Name="Windows.DesktopServer" MinVersion="10.0.19041.0" MaxVersionTested="10.0.22621.0" />
   </Dependencies>
 
   <Resources>

src/cascadia/CascadiaPackage/Package-Pre.appxmanifest

@@ -40,6 +40,7 @@
 
   <Dependencies>
     <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.19041.0" MaxVersionTested="10.0.22621.0" />
+    <TargetDeviceFamily Name="Windows.DesktopServer" MinVersion="10.0.19041.0" MaxVersionTested="10.0.22621.0" />
   </Dependencies>
 
   <Resources>

src/cascadia/CascadiaPackage/Package.appxmanifest

@@ -40,6 +40,7 @@
 
   <Dependencies>
     <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.19041.0" MaxVersionTested="10.0.22621.0" />
+    <TargetDeviceFamily Name="Windows.DesktopServer" MinVersion="10.0.19041.0" MaxVersionTested="10.0.22621.0" />
   </Dependencies>
 
   <Resources>