migrate vim and vim-core to portage-stable

BUG=b/526654058
TEST=presubmit
RELEASE_NOTE=None

cos-patch: bug
Change-Id: I5b51223a49b6f57c47eee00ec8dd4ce14359a76f
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/165609
Reviewed-by: Dom Huh <domhuh@google.com>
Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
18 files changed