Reduce GC impact when dropping a database with lots of placement rules
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type/enhancement
- Dominant language
- Go
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- Avg merge
- 5d 21h
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Description
## Enhancement Task
Here is a profile after dropping a database. The HTTP part is `DeleteRuleByGroup`.
I think after https://github.com/tikv/pd/issues/5827 is closed, it may help. Also, we need to reduce the allocation.
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