SNOW-1416000 Simplify structured objects reading

[sfc-gh-pfus]

Description

SNOW-1416000 Simplified structured objects reading using ScanTo function.

Checklist

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

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 153 lines in your changes missing coverage. Please review.

Project coverage is 74.44%. Comparing base (f1fcb70) to head (8f49001).

Files	Patch %	Lines
structured_type.go	0.00%	153 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1140 +/- ## ========================================== - Coverage 75.44% 74.44% -1.01% ========================================== Files 53 53 Lines 11291 11444 +153 ========================================== Hits 8519 8519 - Misses 2772 2925 +153 ```

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