message: Make VmError::runtime_err private
diff: @@ -267,7 +267,10 @@ impl VmError {
  }
  }
  - pub(crate) fn runtime_err(msg: impl Into<String>) -> Self {
  + // Creates a runtime error with the given message.
  + // This is private since it is only needed when converting wasmer::RuntimeError
  + // to VmError.
  + fn runtime_err(msg: impl Into<String>) -> Self {
  VmError::RuntimeErr {
  msg: msg.into(),
  #[cfg(feature = "backtraces")]
  