[To dev/1.3] fix(pipe): reuse safe local progress on alter (#18423)

[Caideyipi]

Summary

• Backport fix(pipe): reuse safe local progress on alter #18423 (ef0a792a3aafe8ff4b3261c973881b39e890ddcf) to dev/1.3.
• Reuse a safe local committed PipeTask progress during alter when the realtime-only mode and leader remain unchanged, while preserving coordinator progress and explicit mode-reset semantics.
• Collect the latest leader checkpoints before alter and process the dropped/updated PipeMeta entries in one DataNode task-agent invocation.
• Adapt the change to the dev/1.3 extractor parameter, PipeMeta keeper, and heartbeat parser APIs.

Verification

• Spotless passed for ConfigNode, DataNode, and integration-test.
• PipeDataNodeTaskAgentTest and DataNodeInternalRPCServiceImplPushMultiPipeMetaTest: 14 targeted tests passed.
• ConfigNode main/test compilation passed.
• Integration-test main/test compilation passed with with-integration-tests.
• git diff --check origin/dev/1.3..HEAD