[feat] add referenced for default values in destructuring context

[tanhauhau]

Fixes #6964

Marked default values as referenced when destructuring contexts

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• Prefix your PR title with [feat], [fix], [chore], or [docs].
• This message body should clearly illustrate what problems it solves.
• Ideally, include a test that fails without this PR but passes with it.

Tests

• Run the tests with npm test and lint the project with npm run lint

[Conduitry]

The test/validator/samples/unreferenced-variables test is failing. I see that this PR removed the expected warnings from what the test is looking for, but it looks like the compiler is still returning a bunch of warnings.

[tanhauhau]

oops i think that was removed unintentionally. i've reverted the test case.