feat: allow chaining with setAriaLabelProvider

[mikeharv]

The basics

• I validated my changes

The details

Proposed Changes

Updates the Input method setAriaLabelProvider to return itself in order to allow chaining.

Reason for Changes

Other Input methods already allow chaining, such as appendField, setAlign, and setCheck.
This changes make it setting a provider more flexible. For example, this makes it possible to define and set a reference to a new Input while also setting its provider in the same line.
Ex. const input = this.appendDummyInput().setAriaLabelProvider('dummy');