Add visual regression testing for RTL/bidi styles

[tay1orjones]

Once #13619 is finished, the out of the box right-to-left (RTL) styling should be significantly improved.

From there, it would be beneficial if we visually snapshotted the default stories in RTL mode. With the RTL switcher now in the storybook (#13620), this setting is parameterized into the url as &globals=dir:rtl

e.g.

https://deploy-preview-14464--carbon-components-react.netlify.app/?path=/story/components-button--default&globals=dir:rtl

This means we can easily add a VRT test covering every "default" story we have in RTL mode to ensure a baseline of stability visually when it comes to right-to-left styles.

[tay1orjones]

This needs to be refined out and determine if we can/want to contain the additional snapshot load of putting vrt on RTL for every default story.

• Is there a priority of some components or states we'd like to vrt more than others?
• Will every component actually need this? Which components are most important?
• Any component with specific RTL overrides should be snapshotted
• Could we do a mega-snapshot with many components all on one page?

[tay1orjones]

After discussing again with the team:

• The linter we have will now fail PRs if they don't use logical properties
• The bulk of issues we found with regards to right-to-left mode were solved by simply updating to use logical properties
• There isn't a high likelihood of defects resulting from logical properties, and if so, they'll be simple to fix via styling or tweaks to the logical property declarations and values

For all these reasons we feel VRT snapshotting components in right-to-left mode isn't necessary at this time. Additionally, we'd like to get folks using the latest version of our styles that use logical properties to get feedback. We can always revisit this at a later time.