zfs: merge openzfs/zfs@03e9caaec

Notable upstream pull request merges:
#15516 da51bd17e Fix snap_obj_array memory leak in check_filesystem()
#15519 35da34516 L2ARC: Restrict write size to 1/4 of t

zfs: merge openzfs/zfs@03e9caaec

Notable upstream pull request merges:
#15516 da51bd17e Fix snap_obj_array memory leak in check_filesystem()
#15519 35da34516 L2ARC: Restrict write size to 1/4 of the device
#15529 03e9caaec Add a tunable to disable BRT support

Obtained from: OpenZFS
OpenZFS commit: 03e9caaec006134b3db9d02ac40fe9369ee78b03

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