*: add auto sync configuration in creating etcd client (#1240)

[ti-chi-bot]

This is an automated cherry-pick of #1253

This is an automated cherry-pick of #1240

What problem does this PR solve?

Issue Number: close #1236

What is changed and how it works?

Add AutoSyncInterval configuration in creating etcd client.

Check List

Tests

• None

Code changes

• None

Side effects

• None

Related changes

• None

Release note

fix the problem that drainer/pump can't work when pd's topology changes

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[GMHDBJD]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dsdashun, GMHDBJD, lichunzhu

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-06-30 09:57:19.345038472 +0000 UTC m=+79522.719616317: ☑️ agreed by lichunzhu.
• 2023-06-30 10:17:44.273851085 +0000 UTC m=+80747.648428937: ☑️ agreed by GMHDBJD.