mm: mem_reliable: Add memory reliable support during hugepaged collapse

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8USBA


CVE: NA

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Hugepaged collapse pages into huge page will use the same memory region.
When hugepaged collapse pages into huge page, hugepaged will check if
there is any reliable pages in the area to be collapsed. If this area
contains any reliable pages, hugepaged will alloc memory from mirrored
region. Otherwise it will alloc memory from non-mirrored region.

Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>