Cherry pick 29204 and 29409
This is an attempt to keep HDF5Utils
in sync between master and 21.2. Adds things that were never swept to master in !29204 (merged) and !29409 (merged).
This is an attempt to keep HDF5Utils
in sync between master and 21.2. Adds things that were never swept to master in !29204 (merged) and !29409 (merged).