Migrate type tests to Vitest

[aryaemami59]

This PR:

• [X] Converts typetest.ts file extensions to test-d.ts to be compatible with Vitest.
• [X] Converts expectType() to either assertType() or expectTypeOf().toMatchTypeOf().
• [X] Converts expectExactType to expectTypeOf().toEqualTypeOf().
• [X] Converts lone-blocks to test or describe blocks.

[codesandbox-ci[bot]]

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