Added DEBUG switches for roundtrip ILASM (#72128)

* Added DEBUG switches for roundtrip ILASM

* Adding debug switch in the test

* Updated with Bruce's variant

* Update poison.csproj

Author: TIHan

src/tests/Common/CLRTest.Jit.targets

@@ -29,6 +29,12 @@ WARNING:   When setting properties based on their current state (for example:
   ***********************************************************************************************
   -->
 
+  <PropertyGroup>
+    <_IlasmSwitches Condition="'$(DebugType)' == 'Full'">$(_IlasmSwitches) -DEBUG</_IlasmSwitches>
+    <_IlasmSwitches Condition="'$(DebugType)' == 'Impl'">$(_IlasmSwitches) -DEBUG=IMPL</_IlasmSwitches>
+    <_IlasmSwitches Condition="'$(DebugType)' == 'PdbOnly'">$(_IlasmSwitches) -DEBUG=OPT</_IlasmSwitches>
+  </PropertyGroup>
+
   <Target Name="GetIlasmRoundTripBashScript"
           Returns="$(IlasmRoundTripBashScript);$(BashIlrtTestLaunchCmds)">
     <PropertyGroup>