Set total block retention to 30 days

[mmkay]

Issue

Traces seem to disappear after a longer period.

Solution

Set default block_retention to 30 days. Set also compacted_block_retention that says how long blocks should stay around after they've been compacted

Context

See https://github.com/grafana/tempo/blob/main/modules/compactor/config.go#L38 and https://grafana.com/docs/tempo/latest/configuration/#compactor for context.

Testing Instructions

• deploy tempo with something that posts traces
• keep it running for more than 1h
• you should still see the original traces

Release Notes