Ct 1964 add support private key as cred #1472

Job	Run time
build	4m 3s
build_php_table_backend_utils / build_image_php_table_backend_utils	4m 7s
build_datatypes / build_datatypes	0s
build_php_db_import_export / build (8.1)	5m 5s
build_php_storage_driver_common / build_common_driver	0s
build_php_storage_driver_common / protoc	0s
build_php_table_backend_utils / build_php_table_backend_utils	0s
build_php_db_import_export / load-gcs (snowflake)	1m 18s
build_php_db_import_export / load-s3	52s
build_php_db_import_export / load-abs	1m 6s
build_php_db_import_export / load-gcs (bigquery)	1m 5s
build_php_db_import_export / testsS3 (snowflake-s3)	11m 1s
build_php_db_import_export / testsAll (storage)	57s
build_php_db_import_export / testsABS (snowflake-abs)	22m 25s
build_php_db_import_export / testsGCS (snowflake-gcs)	49s
build_php_db_import_export / testsGCS (bigquery)	20m 5s
build_php_db_import_export / clean-s3	19s
build_php_db_import_export / clean-gcs-snowflake	46s
build_php_db_import_export / clean-gcs-bigquery	35s
build_php_db_import_export / clean-abs	22s
test_results	0s
monorepo_split	0s
	1h 14m 55s

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