[Proposal] Allow use ; on noop constructor overloads

[nogic1008]

Description

Allows constructor definitions that only call other constructors to be defined with a ; instead of an empty block.

public class Sample(int id, string name)
{
    public Sample(): this(0, ""); // Use ";" instead of "{ }"
}

Motivation

• ; has fewer things to consider when formating compared to empty blocks. (new line, indent, whitespace...)
• Primary constructors make it common to write constructor overloads.

[333fred]

Duplicate of #4309.

[nogic1008]

It is hard to me to choose search keywords. Thanks a lot!