*: reduce logs of too many pings

[jackysp]

Signed-off-by: Jack Yu [email protected]

What problem does this PR solve?

Issue Number: close #36861

Problem Summary:
#17885 reduced parts of this kind of logs, it could still be found in v6.1.0. According to grpc/grpc#28830, it seems it is not fixed yet. So disable the external pings for br and lightning.

What is changed and how it works?

Do not use PermitWithoutStream.

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

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

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[bb7133]

LGTM, but PTAL @3pointer

[3pointer]

br and lightning didn't use grpc to connect TiDB, so I think the error log didn't came from br or lightning

[jackysp]

br and lightning didn't use grpc to connect TiDB, so I think the error log didn't came from br or lightning

Yes, maybe tiflash, I think. I filed another PR to tiflash pingcap/tiflash#5528.
So another question, is PermitWithoutStream useful for br/lightning? @3pointer