Split UnexpectedTypeException for logic and runtime errors

Invalid arguments and options constitute a logic error, so InvalidArgumentTypeException may be used. For runtime errors (e.g. server returned something we didn't expect), UnexpectedValueTypeException may be used.

src/Exception/InvalidArgumentTypeException.php

+<?php
+
+namespace MongoDB\Exception;
+
+class InvalidArgumentTypeException extends InvalidArgumentException
+{
+    public function __construct($name, $value, $expectedType)
+    {
+        parent::__construct(sprintf('Expected %s to have type "%s" but found "%s"', $name, $expectedType, is_object($value) ? get_class($value) : gettype($value)));
+    }
+}

src/Exception/UnexpectedValueTypeException.php

+<?php
+
+namespace MongoDB\Exception;
+
+class UnexpectedValueTypeException extends UnexpectedValueException
+{
+    public function __construct($name, $value, $expectedType)
+    {
+        parent::__construct(sprintf('Expected %s to have type "%s" but found "%s"', $name, $expectedType, is_object($value) ? get_class($value) : gettype($value)));
+    }
+}