Support JSON/JSONB #> array and #>> array path operators

[theory]

Following the example in 669924a for jsonb_extract_path_text() and jsonb_extract_path(), add support for #> TEXT[] and #>> TEXT.

[theory]

Constants needed, values from src/include/catalog/pg_operator.dat:

#define OID_JSONB_FETCHVAL_PATH_OP 3213
#define OID_JSONB_FETCHVAL_PATH_TEXT_OP 3206
#define OID_JSON_FETCHVA_PATHL_OP 3966
#define OID_JSON_FETCHVAL_PATH_TEXT_OP 3967