[config] Bump ConfigSet format version to force a refresh.
[config] Bump ConfigSet format version to force a refresh.

We had a bunch of bugs that led to config sets to be not
imported fully. Bumping CUR_VERSION will force a full refetch
of all configs sets, making sure all missing Blob entities are
stored.

R=40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org
BUG=1337379

Change-Id: If37a0e9e32523ddec9d88836e082e44c8688a61a
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-py/+/3727125
Commit-Queue: Vadim Shtayura <9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org>
Reviewed-by: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py