[WASI] Remove apphost to align with other mobile targets (#45219)

WASI doesn't use the normal apphost.

Author: pavelsavara

src/Installer/redist-installer/targets/GenerateBundledVersions.targets

@@ -298,6 +298,7 @@
         @(Net70MonoRuntimePackRids);
         freebsd-x64;
         freebsd-arm64;
+        wasi-wasm;
         " />
 
       <Net80MonoRuntimePackRids Remove="win-arm" />

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.RuntimeIdentifierInference.targets

@@ -175,7 +175,7 @@ Copyright (c) .NET Foundation. All rights reserved.
                               $([MSBuild]::VersionLessThan($(_TargetFrameworkVersionWithoutV), '8.0'))">true</SelfContained>
 
     <SelfContained Condition="'$(SelfContained)' == ''">false</SelfContained>
-    <_RuntimeIdentifierUsesAppHost Condition="$(RuntimeIdentifier.StartsWith('ios')) or $(RuntimeIdentifier.StartsWith('tvos')) or $(RuntimeIdentifier.StartsWith('maccatalyst')) or $(RuntimeIdentifier.StartsWith('android')) or $(RuntimeIdentifier.StartsWith('browser'))">false</_RuntimeIdentifierUsesAppHost>
+    <_RuntimeIdentifierUsesAppHost Condition="$(RuntimeIdentifier.StartsWith('ios')) or $(RuntimeIdentifier.StartsWith('tvos')) or $(RuntimeIdentifier.StartsWith('maccatalyst')) or $(RuntimeIdentifier.StartsWith('android')) or $(RuntimeIdentifier.StartsWith('browser')) or $(RuntimeIdentifier.StartsWith('wasi'))">false</_RuntimeIdentifierUsesAppHost>
     <_RuntimeIdentifierUsesAppHost Condition="'$(_IsPublishing)' == 'true' and '$(PublishAot)' == 'true'">false</_RuntimeIdentifierUsesAppHost>
     <_RuntimeIdentifierUsesAppHost Condition="'$(_RuntimeIdentifierUsesAppHost)' == ''">true</_RuntimeIdentifierUsesAppHost>
     <UseAppHost Condition="'$(UseAppHost)' == '' and