Convert data-controls test to TypeScript

[jpstevens]

What?

This PR converts the tests for the data-controls package to TypeScript.

Why?

Ensures package is fully type checked.

How?

• converted files to .ts
• cast dummy requests in tests to APIFetchOptions
• explicitly cast mocked triggerFetch to jest.Mock

Testing Instructions

npm run test:unit -- packages/data-controls tests pass
npm run build:package-types returns a zero exit code

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Co-authored-by: jpstevens <jpstevens@git.wordpress.org>

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