feat(loading): create new cloud loading pattern

[loganmccaul]

Summary

The Cloud Loading pattern is meant to be a replacement for the teal overlay spinner. After a month of user testing we found that we needed a pattern for static content loads. The skeleton components tied to Carbon are great for dynamic data loads, but for content that's static we found that something that doesn't define the structure quite as much is more preferable.

Props

Name	type	description
className	string	Additional classes that can be added to the parent for positioning
title	string	Title of the svg for a11y purposes

styles PR: https://github.com/carbon-design-system/carbon-addons-cloud/pull/74

[carbon-bot]

:tada: This PR is included in version 1.2.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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