yyjson bump version to 2020

[carlopi]

2 PR landed at the same time:

• bumping yyjson in iceberg Change yyjson_get_tag() to yyjson_get_type() when doing type comparisons. duckdb_iceberg#50
• moving yyjson in duckdb (Move yyjson into core #11998)

This PR bumps yyjson version in duckdb to the same commit as it was done in duckdb/duckdb_iceberg#50

[lnkuiper]

Looks good! Thanks

[carlopi]

Not mergeable in the current form, there is a:

D SELECT json_structure('{"duck":"goose"}'->'duck');
INTERNAL Error: Unexpected yyjson tag in ValTypeToLogicalTypeId
This error signals an assertion failure within DuckDB. This usually occurs due to unexpected conditions or errors in the program's logic.
For more information, see https://duckdb.org/docs/dev/internal_errors

raised, haven't looked (yet) at what's going on.

[carlopi]

This might require another look from @lnkuiper, given due to bumping the version the implementation of json_merge_patch changed, and we are just forwarding to it so it changed also for us

Relevant commit (that changes the tests to have them pass) is here: 6977712

[lnkuiper]

I've had another look, and I think you've properly adjusted for the yyjson changes. Thanks!

[Mytherin]

Thanks!