change BigQuery backend basetypes #1450

Job	Run time
build	4m 19s
build_datatypes / build_datatypes (ubuntu-latest, 8.1, latest)	20s
build_php_table_backend_utils / build_image_php_table_backend_utils	5m 0s
build_datatypes / build_datatypes (ubuntu-latest, 8.2, latest)	21s
build_php_db_import_export / build (8.1)	5m 4s
build_php_storage_driver_common / protoc	0s
build_php_storage_driver_common / build_common_driver	0s
build_php_table_backend_utils / build_php_table_backend_utils (snowflake)	5m 11s
build_php_table_backend_utils / build_php_table_backend_utils (bigquery)	6m 33s
build_php_table_backend_utils / build_php_table_backend_utils (exasol)	3m 22s
build_php_db_import_export / load-abs	1m 4s
build_php_db_import_export / load-s3	1m 15s
build_php_db_import_export / load-gcs (snowflake)	1m 4s
build_php_db_import_export / load-gcs (bigquery)	1m 7s
build_php_db_import_export / testsABS (snowflake-abs)	25m 34s
build_php_db_import_export / testsGCS (snowflake-gcs)	9m 20s
build_php_db_import_export / testsGCS (bigquery)	19m 25s
build_php_db_import_export / testsAll (storage)	57s
build_php_db_import_export / testsS3 (snowflake-s3)	19m 45s
build_php_db_import_export / clean-gcs-bigquery	43s
build_php_db_import_export / clean-gcs-snowflake	45s
build_php_db_import_export / clean-s3	10s
build_php_db_import_export / clean-abs	23s
test_results	1s
monorepo_split	0s
	1h 51m 43s

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