Set the deprecated viewModel function's deprecation level to hidden to avoid conflicts with the new one

Author: ShreckYe

lifecycle-viewmodel/src/commonMain/kotlin/ViewModel.kt

@@ -47,7 +47,8 @@ expect inline fun <reified VM : ViewModel> viewModel(
     "Use the one with a `viewModelStoreOwner` parameter instead. " +
             "This function might be removed in the future. " +
             "If you call this function with a `key` argument, make sure you used a named argument " +
-            "so your source still compiles when this is removed."
+            "so your source still compiles when this is removed.",
+    level = DeprecationLevel.HIDDEN
 )
 @Composable
 inline fun <reified VM : ViewModel> viewModel(