Adding generalized support for controller usages with the binding path dropdown. Added optional info blurb on the binding paths covered

[RogPodge]

Description

This PR augments the binding path dropdown, allowing users to add control usages for specific devices.

This PR also adds a "Show Matching Paths" checkbox, which shows the users exactly which specific registered layout paths their current binding path will match with.

The goal of this PR is to address some grievances found in this thread: https://forum.unity.com/threads/openxr-primary2daxisclick-not-working.1120864/

General.Binding.Editing.mp4

Failure.Case.mp4

Changes made

Updated the InputControlPickerDropdown to allow for control usages to be selected and added to the paths in after specifying a desired device.

Augmented the UsageDropdown to be usable in more contexts.

Added unit tests for the new InputControlPath function.

Added new option to the InputBindingsPropertiesView.

Notes

Please write down any additional notes, remove the section if not applicable.

Checklist

Before review:

• Changelog entry added.
  • Explains the change in Changed, Fixed, Added sections.
  • For API change contains an example snippet and/or migration example.
  • FogBugz ticket attached, example ([case %number%](https://issuetracker.unity3d.com/issues/...)).
  • FogBugz is marked as "Resolved" with next release version correctly set.
• Tests added/changed, if applicable.
  • Functional tests Area_CanDoX, Area_CanDoX_EvenIfYIsTheCase, Area_WhenIDoX_AndYHappens_ThisIsTheResult.
  • Performance tests.
  • Integration tests.
• Docs for new/changed API's.
  • Xmldoc cross references are set correctly.
  • Added explanation how the API works.
  • Usage code examples added.
  • The manual is updated, if needed.

During merge:

• Commit message for squash-merge is prefixed with one of the list:
  • NEW: ___.
  • FIX: ___.
  • DOCS: ___.
  • CHANGE: ___.
  • RELEASE: 1.1.0-preview.3.

[jamesmcgill]

Hi @RogPodge, could you migrate this to an internal branch (rather than a external fork) so that the CI jobs run on it?

[lyndon-unity]

This is an old PR.
Closing as its been migrated here:
#1676