Delay-load icu so that we don't fail to start up on Windows <1903 (#18707)

Author: DHowett

Diff for: src/cascadia/TerminalControl/dll/TerminalControl.vcxproj

@@ -95,7 +95,7 @@
   <ItemDefinitionGroup>
     <Link>
       <AdditionalDependencies>delayimp.lib;Uiautomationcore.lib;onecoreuap.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <DelayLoadDLLs>uiautomationcore.dll;%(DelayLoadDLLs)</DelayLoadDLLs>
+      <DelayLoadDLLs>uiautomationcore.dll;icu.dll;%(DelayLoadDLLs)</DelayLoadDLLs>
       <!--
       ControlLib contains a DllMain that we need to force the use of.
       If you don't have this, then you'll see an error like

Diff for: src/host/exe/Host.EXE.vcxproj

@@ -87,6 +87,7 @@
     <Link>
       <AllowIsolation>true</AllowIsolation>
       <AdditionalDependencies>winmm.lib;imm32.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <DelayLoadDLLs>icu.dll;%(DelayLoadDLLs)</DelayLoadDLLs>
     </Link>
   </ItemDefinitionGroup>
   <!-- Careful reordering these. Some default props (contained in these files) are order sensitive. -->