DS storybook - add textarea and textinput stories

[britt6612]

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What does this PR do?

adds textinput and textarea stories

What are the relevant issues?

related to #5710

Where should the reviewer start?

How should this be manually tested?

Any background context you want to provide?

Screenshots (if appropriate)

Should this PR be mentioned in Design System updates?

Is this change backwards compatible or is it a breaking change?

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Latest commit: 25c5455

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