integrate highlevel fuse lib mfusepy #5350

Job	Run time
security	13s
lint	9s
asan_ubsan	6m 27s
native_tests (ubuntu-22.04, 3.10, py310-llfuse)	11m 26s
native_tests (ubuntu-24.04, 3.14, py314-mfusepy)	12m 28s
vm_tests (openbsd, 7.7, OpenBSD, false)	20m 29s
native_tests (ubuntu-22.04, 3.10, mypy)	3m 35s
vm_tests (netbsd, 10.1, NetBSD, false)	15m 14s
native_tests (ubuntu-22.04, 3.11, docs)	3m 11s
vm_tests (haiku, r1beta5, Haiku, false)	11m 48s
vm_tests (freebsd, 14.3, FreeBSD, true, borg-freebsd-14-x86_64-gh)	22m 4s
windows_tests	0s
	1h 47m 4s

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