Allow stepping through object init blocks

[TahirAhmadov]

Summary

Treat object init blocks as a series of separate steps for debugging purposes

Background and Motivation

Given the powerful syntax for collections,etc., sometimes I end up compacting a lot of code into the init block, and currently it's only "one step" - no way to set a breakpoint in the middle, see where exactly an exception is raised from, etc.

Proposed Feature

var x = new Foo
{
  Prop = "abc",
  List = {
    new Bar
    {
      OtherProp = 123,
    }
  },
};

These new "steps" should be recognized (after x = new Foo):

• Set Prop (the Foo instance should be visible in Locals and/or Auto watch windows)
• new Bar
• Set OtherProp (the Foo and Bar instances should be visible in Locals and/or Auto watch windows)
• Add Bar to List (the Foo and Bar instances should be visible in Locals and/or Auto watch windows)

Alternative Designs

N/A

[dibarbet]

@tmat would this be a feature request on the debugger or us?

[dibarbet]

duplicate of #27184