[dotnet] Fix detecting if the interpreter is enabled. (#19812)

The canonical property we use for the interpreter is `MtouchInterpreter` - and
the interpreter is enabled if `MtouchInterpreter` is set to any value (the
`MtouchInterpreter` value is used to select which assemblies to interpret, the
only way to completely disable the interpreter is to not set
`MtouchInterpreter` at all).

So fix a couple of cases of wrong comparison:

* Don't use `UseInterpreter` - which is used to compute a specific value for
  `MtouchInterpreter` - because developers don't have to set `UseInterpreter`
  to enable the interpreter, they can set `MtouchInterpreter` directly.
* Don't compare `MtouchInterpreter` with `true`: that only checks if the
  assembly "true" is interpreted (which it rarely is).

Fixes dotnet/runtime#96920.

dotnet/targets/Xamarin.Shared.Sdk.targets

@@ -141,7 +141,7 @@
 		<VerifyDependencyInjectionOpenGenericServiceTrimmability Condition="'$(VerifyDependencyInjectionOpenGenericServiceTrimmability)' == '' And '$(_BundlerDebug)' != 'true'">false</VerifyDependencyInjectionOpenGenericServiceTrimmability>
 		<VerifyDependencyInjectionOpenGenericServiceTrimmability Condition="'$(VerifyDependencyInjectionOpenGenericServiceTrimmability)' == ''">true</VerifyDependencyInjectionOpenGenericServiceTrimmability>
 		<!-- This should be set by dotnet/sdk instead, once https://github.com/dotnet/sdk/issues/25392 gets resolved.  -->
-		<DynamicCodeSupport Condition="'$(DynamicCodeSupport)' == '' And '$(UseInterpreter)' != 'true' And ('$(_PlatformName)' == 'iOS' Or '$(_PlatformName)' == 'tvOS' Or '$(_PlatformName)' == 'MacCatalyst')">false</DynamicCodeSupport>
+		<DynamicCodeSupport Condition="'$(DynamicCodeSupport)' == '' And '$(MtouchInterpreter)' != '' And ('$(_PlatformName)' == 'iOS' Or '$(_PlatformName)' == 'tvOS' Or '$(_PlatformName)' == 'MacCatalyst')">false</DynamicCodeSupport>
 
 		<!-- We don't need to generate reference assemblies for apps or app extensions -->
 		<ProduceReferenceAssembly Condition="'$(ProduceReferenceAssembly)' == '' And ('$(OutputType)' == 'Exe' Or '$(IsAppExtension)' == 'true')">false</ProduceReferenceAssembly>
@@ -416,7 +416,7 @@
 	<Target Name="_ComputeMonoComponents" Condition="'$(UseMonoRuntime)' == 'true' And '$(_LibMonoLinkMode)' == 'static'" BeforeTargets="_MonoSelectRuntimeComponents" DependsOnTargets="_ComputeVariables">
 		<!-- https://github.com/dotnet/runtime/blob/main/docs/design/mono/components.md -->
 		<ItemGroup>
-			<_MonoComponent Include="hot_reload" Condition="'$(MtouchInterpreter)' == 'true'" />
+			<_MonoComponent Include="hot_reload" Condition="'$(MtouchInterpreter)' != ''" />
 			<_MonoComponent Include="debugger" Condition="'$(_BundlerDebug)' == 'true'" />
 			<_MonoComponent Include="diagnostics_tracing" Condition="'$(_BundlerDebug)' == 'true'" />
 			<_MonoComponent Include="marshal-ilgen" Condition="'$(_AppleExcludeMarshalIlgenComponent)' != 'true'" />