[wasm] Fix debug build of AOT cross compiler (#50418)

For mono AOT cross compiler we use llvm libraries
from `runtime.win-x64.microsoft.netcore.runtime.mono.llvm.sdk` package.
These are built in Release configuration. On windows we get
linker errors when mixing them with obj files compiled with debug flags.

To avoid that, build the AOT cross compiler always as in Release
configuration.

Example of the errors:

    LLVMSupport.lib(Unicode.cpp.obj) : error LNK2038: mismatch detected for '_ITERATOR_DEBUG_LEVEL': value '0' doesn't match value '2' in monosgen-2.0.lib(mini-llvm-cpp.cpp.obj)
    LLVMSupport.lib(Unicode.cpp.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MT_StaticRelease' doesn't match value 'MTd_StaticDebug' in monosgen-2.0.lib(mini-llvm-cpp.cpp.obj)

src/mono/mono.proj

@@ -468,6 +468,7 @@
       <MonoLibClang Condition="$([MSBuild]::IsOSPlatform('Linux'))">$(EMSDK_PATH)/upstream/lib/libclang.so</MonoLibClang>
       <MonoLibClang Condition="$([MSBuild]::IsOSPlatform('Windows'))">$([MSBuild]::NormalizePath('$(EMSDK_PATH)', 'upstream', 'bin', 'libclang.dll'))</MonoLibClang>
       <PythonCmd Condition="'$(OS)' == 'Windows_NT'">call &quot;$([MSBuild]::NormalizePath('$(EMSDK_PATH)', 'emsdk_env.bat'))&quot; &amp;&amp; python</PythonCmd>
+      <_ForceRelease Condition="$([MSBuild]::IsOSPlatform('Windows')) and '$(TargetArchitecture)' == 'wasm' and '$(Configuration)' == 'Debug'">true</_ForceRelease>
     </PropertyGroup>
 
     <!-- Windows specific options -->
@@ -478,8 +479,8 @@
       <_MonoAOTCPPFLAGS Include="-DWIN32_LEAN_AND_MEAN" />
       <!--<_MonoAOTCPPFLAGS Include="-D_WINDOWS" />--> <!-- set in monow.vcxproj, not sure we really need it -->
       <_MonoAOTCPPFLAGS Condition="'$(Platform)' == 'x64' or '$(Platform)' == 'arm64'" Include="-DWIN64" />
-      <_MonoAOTCPPFLAGS Condition="'$(Configuration)' == 'Release'" Include="-DNDEBUG" />
-      <_MonoAOTCPPFLAGS Condition="'$(Configuration)' == 'Debug'" Include="-D_DEBUG" />
+      <_MonoAOTCPPFLAGS Condition="'$(Configuration)' == 'Release' or '$(_ForceRelease)' == 'true'" Include="-DNDEBUG" />
+      <_MonoAOTCPPFLAGS Condition="'$(Configuration)' == 'Debug' and '$(_ForceRelease)' != 'true'" Include="-D_DEBUG" />
       <!-- <_MonoAOTCPPFLAGS Include="-D__default_codegen__" /> --> <!-- doesn't seem to be used -->
       <_MonoAOTCPPFLAGS Include="-D_CRT_SECURE_NO_WARNINGS" />
       <_MonoAOTCPPFLAGS Include="-D_CRT_NONSTDC_NO_DEPRECATE" />
@@ -539,7 +540,8 @@
       <MonoAOTCMakeArgs Include="-DAOT_TARGET_TRIPLE=$(MonoAotAbi)"/>
       <MonoAOTCMakeArgs Condition="'$(_MonoUseNinja)' == 'true'" Include="-G Ninja"/>
       <MonoAOTCMakeArgs Include="-DCMAKE_INSTALL_PREFIX=$([MSBuild]::NormalizePath('$(MonoObjCrossDir)', 'out'))"/>
-      <MonoAOTCMakeArgs Include="-DCMAKE_BUILD_TYPE=$(Configuration)"/>
+      <MonoAOTCMakeArgs Condition="'$(_ForceRelease)' != 'true'" Include="-DCMAKE_BUILD_TYPE=$(Configuration)"/>
+      <MonoAOTCMakeArgs Condition="'$(_ForceRelease)' == 'true'" Include="-DCMAKE_BUILD_TYPE=Release"/>
       <!-- FIXME: Disable more -->
       <MonoAOTCMakeArgs Include="-DENABLE_MINIMAL=" />
       <MonoAOTCMakeArgs Include="-DENABLE_ICALL_SYMBOL_MAP=1" />