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tsdb: call PostDeletion when WAL replay evicts fully-tombstoned series

tsdb: call PostDeletion when WAL replay evicts fully-tombstoned series: a task in rh-swe-bench (Harbor dataset). Title: tsdb: call PostDeletion when WAL replay evicts fully-tombstoned series

The task

**Title:** tsdb: call PostDeletion when WAL replay evicts fully-tombstoned series

Part of rounakbende/rh-swe-bench.