Fix TIMESTAMP_TZ issue in 0.10.0

[niger-prequel]

Fixes #172

Completed

• Update duckdb.h
• Include serialization for DUCKDB_TYPE_TIMESTAMP_TZ

Notes

• There may be other types that need similar treatment like DUCKDB_TYPE_TIME_TZ. I only addressed what was blocking functionality for Prequel
• I believe this only works against the HEAD of main for DuckDB and not the v0.10.0 tag.

[taniabogatsch]

Updating the header will happen after DuckDB's next bug-fix release, as go-duckdb does not build cutting-edge binaries. From my understanding, the current header already includes the TIMESTAMPTZ, so the fix should work without the header changes.

[niger-prequel]

@taniabogatsch reverted the header change.

[marcboeker]

@niger-prequel Thanks for the PR. I think we can close this in favor of #180?
cc @taniabogatsch