planner: fix idxMergePartPlans forget to deal with RootTaskConds (#58507)#58517

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ti-chi-bot[bot] merged 2 commits intopingcap:release-6.5from ti-chi-bot:cherry-pick-58507-to-release-6.5

Jan 23, 2025

Commits on Dec 25, 2024

This is an automated cherry-pick of pingcap#58507

hawkingrei
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ti-chi-bot
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Commits on Jan 23, 2025

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hawkingrei
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