store/copr: use a ttl duration to protect a new recovered tiflash nod…

[hanfei1991]

What problem does this PR solve?

Problem Summary: When a tiflash down is down and recovered, it possibly cannot provide service for a period. If we send query to some unstable node, it will block the whole query.
To work around, we set a fail store ttl time. During that time, we will not send query to that node.

What is changed and how it works?

Proposal: See #26793

What's Changed:

How it Works:

Check List

Tests

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

store/copr: block the tiflash node for a period when it fails before.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• LittleFall
• qw4990

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[LittleFall]

LGTM

[zhouqiang-cl]

/merge

[ti-chi-bot]

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

Commit hash: 219c398