This is an automated cherry-pick of #9636

backport https://github.com/tidbcloud/tiflash-cse/pull/295

What problem does this PR solve?

Issue Number: close #9637

Problem Summary:
when tiflash replica>1, the vector search qps is only 60% of the case when the tiflash replica=1

What is changed and how it works?

In this pr: [https://github.com/tikv/client-c/pull/193](https://github.com/tikv/client-c/pull/193)
add a bool paramater centralized_schedule for Client::buildBatchCopTasks
When set to true:  Regions are concentrated into as few BatchCopTasks as possible

This PR modifies the call to this function, setting the newly added parameter to true when the request is a ANN query.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

• tiflash replica = 1, 2, ,3 , both all regions on one tiflash store and none-single tiflash store has all segmetns
• called by an ANN request and non-ann reuqest
• kill the requested tiflash

• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Fix the vector search performance regression when tiflash write node scale out under disaggregated arch