SNOW-1283946 Embed structured types

[sfc-gh-pfus]

Description

SNOW-1283946 Handle embedded structured types.

Checklist

• [ ] Created tests which fail without the change (if possible)
• [ ] Extended the README / documentation, if necessary

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 1.82927% with 483 lines in your changes are missing coverage. Please review.

Project coverage is 75.83%. Comparing base (3b14581) to head (a244672).

Files	Patch %	Lines
converter.go	0.42%	469 Missing :warning:
structured_type.go	0.00%	14 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1096 +/- ## ========================================== - Coverage 77.07% 75.83% -1.24% ========================================== Files 52 53 +1 Lines 10947 11134 +187 ========================================== + Hits 8437 8444 +7 - Misses 2510 2690 +180 ```

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