Raftstore-v2: use appropriate default region split size when integration test suit start

[SpadeA-Tang]

Signed-off-by: SpadeA-Tang u6748471@anu.edu.au

What is changed and how it works?

Issue Number: Ref #12842

What's Changed:

use appropriate default region split size when integration test suit start

When the appropriate default region split size is used, test_delay_split_region can pass using raftstore-v2.

Check List

Tests

• Unit test
• Integration test

Release note

None

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[tabokie]

/merge

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This pull request has been accepted and is ready to merge.

Commit hash: 556e990