mm: follow up work for the MM v6.4 update and disable CONFIG_PER_VMA_LOCK until it is fixed

JIRA: https://issues.redhat.com/browse/RHEL-48221

It was identified that our process to bring in code-base updates
has been unwittingly missing some of the peripheric commits not
touching directly the core code under mm/ the directory.
While most of these identified peripheric commits are simple
and basic clean-ups, some are relevant changesets that might end
up causing real(and subtle) issues for RHEL deployments if they
remain missing.

The intent of this patchset is to close the aforementioned GAP
by bringing in the missing peripheric commits from v5.14 up to
v6.4, which is the level we're parking our codebase for RHEL-9.5.

A secondary intent of this patchset is to bring in upstream's
v6.5 commit that disables the PER_VMA_LOCK feature which was
recently introduced (to RHEL-9.5) but was marked BROKEN upstream
circa release v6.5, in order to avoid the reported issues with
memory corruptions in the upstream builds.

Signed-off-by: Rafael Aquini aquini@redhat.com