[wasm] Set TrimMode=partial by default, which is equivalent to the older (#72234)

.. `TrimMode=link`.

The `TrimMode` values changed in dotnet/sdk#26246 .

Author: radical

src/mono/wasm/build/WasmApp.InTree.props

@@ -9,7 +9,7 @@
     <EMSDK_PATH Condition="'$(EMSDK_PATH)' == '' and '$(MonoProjectRoot)' != ''">$([MSBuild]::NormalizeDirectory($(MonoProjectRoot), 'wasm', 'emsdk'))</EMSDK_PATH>
     <RunAOTCompilation Condition="'$(RunAOTCompilation)' == ''">false</RunAOTCompilation>
     <PublishTrimmed>true</PublishTrimmed>
-    <TrimMode>link</TrimMode>
+    <TrimMode>partial</TrimMode>
     <RunAnalyzers>false</RunAnalyzers>
   </PropertyGroup>
   <!-- This is temporary hack for https://github.com/dotnet/runtime/issues/61294 -->

src/mono/wasm/build/WasmApp.LocalBuild.targets

@@ -26,7 +26,7 @@
 
   <PropertyGroup>
     <PublishTrimmed Condition="'$(PublishTrimmed)' == ''">true</PublishTrimmed>
-    <TrimMode>link</TrimMode>
+    <TrimMode>partial</TrimMode>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)' != 'Debug'">

src/mono/wasm/build/WasmApp.targets

@@ -106,6 +106,7 @@
     <WasmGenerateAppBundle Condition="'$(WasmGenerateAppBundle)' == '' and '$(OutputType)' != 'Library'">true</WasmGenerateAppBundle>
     <WasmGenerateAppBundle Condition="'$(WasmGenerateAppBundle)' == ''">false</WasmGenerateAppBundle>
     <UseAppHost>false</UseAppHost>
+    <TrimMode Condition="'$(TrimMode)' == ''">partial</TrimMode>
 
     <!-- Temporarily `false`, till sdk gets a fix for supporting the new file -->
     <WasmEmitSymbolMap Condition="'$(WasmEmitSymbolMap)' == '' and '$(RunAOTCompilation)' != 'true'">false</WasmEmitSymbolMap>