Support bulk-load in tiered cursors (i.e., the bulk option to WT_SESSION::open_cursor()). This will just load data into the top tier of the tiered table.
The implementation should pass test_bulk01.py with tiered cursor hooks similar to those used in WT-7355.
We might also support the checkpoint tests in test_bulk02.py. But we won't be able to support the backup scenarios from that same file yet.