Improve type error messages when an object is given

From now on, we always display the given object's type instead of just reporting "object".
Additionally, make the format of return typ

Improve type error messages when an object is given

From now on, we always display the given object's type instead of just reporting "object".
Additionally, make the format of return type errors match the format of argument errors.

Closes GH-5625

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Make numeric operations on resources, arrays and objects type errors

RFC: https://wiki.php.net/rfc/arithmetic_operator_type_checks

Closes GH-5331.

Make throw statement an expression

RFC: https://wiki.php.net/rfc/throw_expression

This has an open issue with temporaries that are live at the time
of the throw being leaked. La

Make throw statement an expression

RFC: https://wiki.php.net/rfc/throw_expression

This has an open issue with temporaries that are live at the time
of the throw being leaked. Landing this now for easier testing and
will revert if we cannot resolve the issue.

Closes GH-5279.

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