chore: ignore all previous known Renovate bots

There are currently numerous Renovate MRs which Renovate will not update since the email address of the Renovate author has changed.

This MR updates the renovate config to ignore all known previous Renovate bot author emails, so that Renovate will be willing to update these MRs once again.

The list was generated using the following command:

glab api --paginate 'groups/gitlab-com%2fgl-infra/merge_requests?state=opened&order_by=created_at&sort=asc&label=maintenance::dependency' |
  jq -r '
    .[] |
    select(.title|contains("update dependency")) |
    "projects/\(.project_id)/merge_requests/\(.iid)/commits"'|
while read line; do
  glab api "$line" |
    jq -r '.[]|.author_email';
done|
sort -u

And then lightly edited.