[DNM] update tiflash proxy to 6.0

[CalvinNeo]

Signed-off-by: CalvinNeo [email protected]

What problem does this PR solve?

Issue Number: close #4618

Problem Summary:

What is changed and 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

None

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[CalvinNeo]

/run-all-tests

[sre-bot]

Coverage for changed files

no c/c++ source change detected

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
17020      9515             44.10%    191828  96444        49.72%

full coverage report (for internal network access only)

[CalvinNeo]

/run-all-tests

[sre-bot]

Coverage for changed files

no c/c++ source change detected

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
17020      9515             44.10%    191828  96441        49.73%

full coverage report (for internal network access only)

[ti-chi-bot]

@CalvinNeo: PR needs rebase.

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