implement `pg_catalog.pg_type` table #5296

Job	Run time
Build	2m 8s
Node.js Binding Tests	4m 14s
PG Protocol Tests	2m 9s
Datasource Integration (Clickhouse)	1m 33s
Process Integration Tests (pytest)	1m 22s
Datasource Integration (Cassandra)	1m 34s
Datasource Integration (Mysql)	2m 19s
Datasource Integration (MongoDB)	27s
Python Binding Tests	4m 15s
Service Integration Tests (SLT)	4m 25s
Datasource Integration (Sqlserver)	7m 55s
SQL Logic Tests (postgres)	27s
SQL Logic Tests (flightsql)	24s
SQL Logic Tests (rpc)	5m 25s
Lint and Format	2m 39s
Unit Tests	6m 12s
Snowflake Service Integration Tests (SLT::Snowflake)	1m 22s
	48m 50s

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