vim, vim-core: upgraded packages to upstream

Upgraded app-editors/vim to version 8.2.3428 on amd64, arm64
Upgraded app-editors/vim-core to version 8.2.3428 on amd64, arm64

BUG=b/201632432,b/201202221,b/201202353,b/199713966,b/199641588
TEST=sudo emerge vim, run vim locally, presubmits
RELEASE_NOTE=Updated vim to version 8.2.3428. This resolves CVE-2021-3796,
CVE-2021-3778, and CVE-2021-3770.

Change-Id: I007a6987f6255b47caa8b3bc0c1c9d5caad0408e
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/portage-stable/+/23350
Reviewed-by: Sam Kunz <samkunz@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
6 files changed