Move blockscopy tool to Mimir repository (#265)

Signed-off-by: Marco Pracucci <[email protected]>

Signed-off-by: Marco Pracucci <[email protected]>

Author: pracucci

cmd/blockscopy/Dockerfile

@@ -1,9 +1,3 @@
-# Blocks copy
-
-This program can copy Cortex blocks between two GCS buckets. It is GCS specific and uses special calls to copy
-files between buckets directly, without download to a local system first.
-
-Blocks copy can run in one-time mode, or as a service and do regular copies.
-
-It can be configured with minimum block time range to avoid copying of blocks that are too small.
-It can also be configured with list of users to copy, or avoid copying blocks for.
+The `blockscopy` tool has been migrated to the Grafana Mimir repository
+and renamed to `copyblocks`:
+https://github.com/grafana/mimir/tree/main/tools/copyblocks