tikv: fix "Got too many pings" GRPC error in PD-server follower (#17885)

[sre-bot]

cherry-pick #17885 to release-4.0

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What problem does this PR solve?

Issue Number: close #17870

Problem Summary:

In PD(etcd) server side, PermitWithoutStream values is false https://github.com/etcd-io/etcd/blob/master/embed/etcd.go#L641, means

and client sends ping when there are no active streams, server will send GOAWAY and close the connection.

but in TiDB client side, PermitWithoutStream values is true means

client sends keepalive pings even with no active RPCs

so, with those conflict configuration, grpc server side will count pingStrike with wrong value.

https://github.com/grpc/grpc-go/blob/master/internal/transport/http2_server.go#L711

and report "transport: Got too many pings from the client, closing the connection." error.

What is changed and how it works?

What's Changed, How it Works:

we need keep them both as true or false, but etcd write it with magic value(false)

so we only can change tidb-side to false

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Manual test

setup a cluster, some tidb node use this fix
"Got too many pings" will happen but only in node that without this patch.

Side effects

• ?

Release note

• Fix "Got too many pings" grpc error log in PD-server follower

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This change is 

[sre-bot]

/run-all-tests

[coocood]

LGTM

[jackysp]

LGTM

[jackysp]

/merge

[sre-bot]

Your auto merge job has been accepted, waiting for:

• 17899

[sre-bot]

/run-all-tests