Return 400 for invalid UTF-8 multipart fields (#1239) #2276

Job	Run time
test (mysql, mysql, mysql://root:Password123!@127.0.0.1/sqlpage)	2m 1s
compile_and_lint	4m 43s
docker_build (linux/amd64, minimal)	5m 19s
test (postgres, postgres, postgres://root:Password123!@127.0.0.1/sqlpage)	2m 32s
windows_test	3m 30s
test (oracle, oracle, Driver=Oracle 21 ODBC driver;Dbq=//127.0.0.1:1521/FREEPDB1;Uid=root;Pwd=Pas...	2m 57s
test (odbc, postgres, Driver=PostgreSQL Unicode;Server=127.0.0.1;Port=5432;Database=sqlpage;UID=r...	3m 32s
docker_build (linux/arm64, duckdb)	6m 19s
docker_build (linux/arm64, minimal)	6m 9s
docker_build (linux/amd64, duckdb)	6m 11s
docker_build (linux/arm/v7, minimal)	6m 12s
test (mssql, mssql, mssql://root:Password123!@127.0.0.1/sqlpage)	2m 19s
docker_push (minimal)	14s
docker_push (duckdb)	17s
	52m 15s

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