UPSTREAM: mm/truncate: don't skip dirty page in folio_unmap_invalidate()

... otherwise this is a behavior change for the previous callers of
invalidate_complete_folio2(), e.g. the page invalidation routine.

Bug: 416315033
(cherry picked from commit 92728998)
Fixes: 4a9e2315 ("mm/truncate: add folio_unmap_invalidate() helper")
Change-Id: Ib18b4f5329a7609e9d29ac8709a8b60b3e4c3825
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Link: https://lore.kernel.org/r/20250218120209.88093-3-jefflexu@linux.alibaba.com


Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Akilesh Kailash <akailash@google.com>