BACKPORT: f2fs: allocate node blocks for atomic write block replacement

When a node block is missing for atomic write block replacement, we need
to allocate it in advance of the replacement.

Bug: 298879042
Bug: 308706939
Change-Id: Ia9daad11660068d40bda255ff585d42f89e09399
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit 4bfa7f8c)
Signed-off-by: zhoudan8 <zhoudan8@xiaomi.com>