Fix struct parsing

[andyfengHKU]

This PR fixes

• parsing struct with quoted key e.g. {"a": 1}
• group out of bound for regex functions
• print STRUCT type as STRUCT(KEY:DATATYPE...) instead of. STRUCT(DATATYPE...)

[codecov]

Codecov Report

Patch coverage: 91.89% and project coverage change: -0.01 ⚠️

Comparison is base (657623b) 91.94% compared to head (d51e2b5) 91.94%.

❗ Current head d51e2b5 differs from pull request most recent head 1a10e07. Consider uploading reports for the commit 1a10e07 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1609      +/-   ##
==========================================
- Coverage   91.94%   91.94%   -0.01%     
==========================================
  Files         715      715              
  Lines       26057    26064       +7     
==========================================
+ Hits        23959    23964       +5     
- Misses       2098     2100       +2     

Impacted Files	Coverage Δ
src/common/types/value.cpp	92.03% <ø> (ø)
src/storage/storage_structure/column.cpp	91.42% <ø> (ø)
src/storage/wal_replayer_utils.cpp	98.52% <ø> (ø)
tools/nodejs_api/src_cpp/node_util.cpp	94.30% <ø> (ø)
tools/python_api/src_cpp/py_query_result.cpp	97.05% <ø> (ø)
src/parser/transformer.cpp	95.79% <75.00%> (-0.15%)	⬇️
...e/in_mem_storage_structure/in_mem_column_chunk.cpp	80.26% <80.00%> (ø)
src/c_api/value.cpp	100.00% <100.00%> (ø)
src/common/types/types.cpp	91.56% <100.00%> (+0.09%)	⬆️
src/common/vector/auxiliary_buffer.cpp	100.00% <100.00%> (ø)
... and 8 more

... and 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.