Re-Enable JIT calls for Wasm Target in Crossgen (#122334)

This PR reverts the behavior from #122111 which stubs out a method
instead of calling the JIT for the crossgen Wasm target. Now, the JIT
will be invoked as normal so that the output of method codegen can be
placed in a simple object file.

Output code currently won't run (I tried this) because we aren't yet
emitting a correct local count at the beginning of compiled methods.

Author: adamperlin

src/coreclr/tools/Common/JitInterface/CorInfoImpl.cs

@@ -317,36 +317,6 @@ IntPtr LocalObjectToHandle(object input)
             return null;
         }
 
-        private CorJitResult CompileWasmStub(out IntPtr exception, ref CORINFO_METHOD_INFO methodInfo, out uint codeSize)
-        {
-            byte[] stub =
-            [
-                0x00, // local variable count
-                0x41, // i32.const
-                0x0,  // uleb128 0
-                0x0F, // return
-                0x0B,  // end
-            ];
-            AllocMemArgs args = new AllocMemArgs
-            {
-                hotCodeSize = (uint)stub.Length,
-                coldCodeSize = (uint)0,
-                roDataSize = (uint)0,
-                xcptnsCount = _ehClauses != null ? (uint)_ehClauses.Length : 0,
-                flag = CorJitAllocMemFlag.CORJIT_ALLOCMEM_DEFAULT_CODE_ALIGN,
-            };
-            allocMem(ref args);
-
-            _code = stub;
-
-            codeSize = (uint)stub.Length;
-            exception = IntPtr.Zero;
-
-            _codeRelocs = new();
-
-            return CorJitResult.CORJIT_OK;
-        }
-
         private CompilationResult CompileMethodInternal(IMethodNode methodCodeNodeNeedingCode, MethodIL methodIL)
         {
             // methodIL must not be null
@@ -369,17 +339,9 @@ private CompilationResult CompileMethodInternal(IMethodNode methodCodeNodeNeedin
             IntPtr exception;
             IntPtr nativeEntry;
             uint codeSize;
-
-            TargetArchitecture architecture = _compilation.TypeSystemContext.Target.Architecture;
-            var result = architecture switch
-            {
-                // We currently do not have WASM codegen support, but for testing, we will return a stub
-                TargetArchitecture.Wasm32 => CompileWasmStub(out exception, ref methodInfo, out codeSize),
-                _ => JitCompileMethod(out exception,
+            var result = JitCompileMethod(out exception,
                     _jit, (IntPtr)(&_this), _unmanagedCallbacks,
-                    ref methodInfo, (uint)CorJitFlag.CORJIT_FLAG_CALL_GETJITFLAGS, out nativeEntry, out codeSize)
-            };
-
+                    ref methodInfo, (uint)CorJitFlag.CORJIT_FLAG_CALL_GETJITFLAGS, out nativeEntry, out codeSize);
             if (exception != IntPtr.Zero)
             {
                 if (_lastException != null)