[DNM] Stress test with high write load

[sticnarf]

What problem does this PR solve?

To test different cases that causes errors like Server is Busy, Region Unavailable...

What is changed and how does it work?

Check List

Tests

• Unit test
• E2E test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has Go code change
• Has CI related scripts change
• Has Terraform scripts change

Side effects

• Breaking backward compatibility

Related changes

• Need to update the documentation

Does this PR introduce a user-facing change?:

NONE