Pipe: Fix delete inclusion aliases and metrics maps

[Caideyipi]

Description

This PR fixes two small Pipe issues:

• Corrects the delete and schema.delete inclusion aliases to use the legal option schema.timeseries.ordinary.drop instead of the nonexistent schema.timeseries.ordinary.delete.
• Uses ConcurrentHashMap for DataNode pipe processor/sink metric task registries, matching the existing concurrent metric map usage and avoiding unsynchronized access during metric bind/unbind and task register/deregister.

Tests

• mvn -Ddevelocity.off=true -pl iotdb-core/node-commons -Dtest=PipeInclusionOptionsTest test
• mvn -Ddevelocity.off=true -pl iotdb-core/node-commons,iotdb-core/datanode spotless:apply
• git diff --check