tests: fix some test cases in real TiKV env

[Defined2014]

What problem does this PR solve?

Issue Number: ref #45961, close #49177

Problem Summary: We found check_dev2 didn't enable real tikv env correct before. When we try to enable it, found some problems need to fix. PingCAP-QE/ci#2519 (comment)

Also found 4 issues with real tikv

• Error msg is not same in unistore and TiKV #47693
• Error msg not same in unistore and TiKV #47692
• Get wrong result with field func and utf8mb4_general_ci in real TiKV env #47688
• admin recover index report error with real TiKV #47687

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

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

[tiprow]

Hi @Defined2014. Thanks for your PR.

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[Defined2014]

Just like test before, we needn't check result log.

[codecov]

Codecov Report

Merging #47697 (c9cdf28) into master (ab4c20b) will increase coverage by 1.3783%.
Report is 6 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #47697        +/-   ##
================================================
+ Coverage   71.8756%   73.2539%   +1.3783%     
================================================
  Files          1396       1421        +25     
  Lines        404969     417725     +12756     
================================================
+ Hits         291074     306000     +14926     
+ Misses        94275      92586      -1689     
+ Partials      19620      19139       -481     

Flag	Coverage Δ
integration	41.2951% <ø> (?)
unit	72.4069% <ø> (+0.5313%)	⬆️

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

Components	Coverage Δ
dumpling	53.9913% <ø> (ø)
parser	∅ <ø> (∅)
br	49.4653% <ø> (-3.4866%)	⬇️

[YangKeao]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, YangKeao

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• OWNERS [YangKeao,hawkingrei]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-10-17 05:18:27.827752887 +0000 UTC m=+1720705.414863032: ☑️ agreed by hawkingrei.
• 2023-10-17 07:37:53.187922489 +0000 UTC m=+1729070.775032635: ☑️ agreed by YangKeao.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #49172.