pkg/p2p(ticdc): fix default p2p config

[CharlesCheung96]

What problem does this PR solve?

Issue Number: close #11215

What is changed and how it works?

Increase the p2p configuration to cache more messages

Check List

Tests

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

Deploy ticdc cluster(7 nodes, 8c16g, replicating 150k tables, 1 changefeed) with the following configuration:

[debug.scheduler]
add-table-batch-size = 1000

1. Before this pr:
   The scheduling task took up to 3 hours to complete:
   
2. This pr:
   The dispatch task was completed in 10 minutes:
   

Questions

Will it cause performance regression or break compatibility?

No

Do you need to update user documentation, design documentation or monitoring documentation?

No

Release note

`None`.

[ti-chi-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[CharlesCheung96]

/test all

[CharlesCheung96]

/test all

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 12 lines in your changes missing coverage. Please review.

Project coverage is 58.2007%. Comparing base (cf7055d) to head (cee8901).
Report is 24 commits behind head on master.

Additional details and impacted files

Components	Coverage Δ
cdc	62.4286% <40.0000%> (∅)
dm	51.2560% <ø> (+0.0458%)	⬆️
engine	63.4232% <ø> (+0.0141%)	⬆️

Flag	Coverage Δ
unit	58.2007% <40.0000%> (+4.2818%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

@@               Coverage Diff                @@
##             master     #11182        +/-   ##
================================================
+ Coverage   53.9188%   58.2007%   +4.2818%     
================================================
  Files           403        850       +447     
  Lines         63781     127952     +64171     
================================================
+ Hits          34390      74469     +40079     
- Misses        26694      48062     +21368     
- Partials       2697       5421      +2724     

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: asddongmen, hongyunyan

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• OWNERS [asddongmen,hongyunyan]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-06-13 02:04:06.475714491 +0000 UTC m=+603000.529026411: ☑️ agreed by hongyunyan.
• 2024-06-13 02:08:41.101131625 +0000 UTC m=+603275.154443548: ☑️ agreed by asddongmen.

[CharlesCheung96]

/retest

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #11306.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #11307.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #11308.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.1: #11309.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #11310.