[1.14] [FPR/FPH] use madvise(MADV_REMOVE) instead of fallocate(PUNCH_HOLE) in memfd#18

kalyazin merged 2 commits into

e2b-dev:firecracker-v1.14-direct-meme2b-dev/firecracker:firecracker-v1.14-direct-memfrom

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