chore(dashboard): update TiDB Dashboard to v8.0.0-9768844f [release-8.0]

[baurine]

What problem does this PR solve?

Issue Number: Close #7989 , ref #4257

Update TiDB Dashboard to v8.0.0-9768844f.

This PR fixes the error that hosts/disks/statistics page can't show normally when use pd micro-service mode.

TiDB Dashboard side PR: pingcap/tidb-dashboard#1664

Release note

None

Test

$ make pd-server
$ cp bin/pd-server ~/.tiup/components/pd/v8.0.0-alpha-nightly/pd-server
# pd ms mode
$ tiup playground nightly --pd.mode ms --pd.api 1 --pd.scheduling 1 --pd.tso 1 --pd.rm 0 --kv 3 --tiflash 0 --db 1
# pd non-ms mode
$ tiup playground nightly --tiflash 0

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• HuSharp
• lhy1024

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[ti-chi-bot]

Hi @baurine. Thanks for your PR.

I'm waiting for a tikv member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[lhy1024]

/ok-to-test

[codecov]

Codecov Report

Merging #7984 (34b979b) into release-8.0 (92a303c) will increase coverage by 0.03%.
Report is 1 commits behind head on release-8.0.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-8.0    #7984      +/-   ##
===============================================
+ Coverage        73.50%   73.53%   +0.03%     
===============================================
  Files              436      436              
  Lines            48351    48351              
===============================================
+ Hits             35539    35554      +15     
+ Misses            9751     9739      -12     
+ Partials          3061     3058       -3     

Flag	Coverage Δ
unittests	73.53% <ø> (+0.03%)	⬆️

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[baurine]

replaced by #7990