playground: support ModeNextGenFTS

[Lloyd-Pottiger]

What problem does this PR solve?

close #xxx

What is changed and how it works?

Check List

Tests

• [ ] Unit test
• [ ] Integration test
• [ ] Manual test (add detailed scripts or steps below)
• [ ] No code

Code changes

• [ ] Has exported function/method change
• [ ] Has exported variable/fields change
• [ ] Has interface methods change
• [ ] Has persistent data change

Side effects

• [ ] Possible performance regression
• [ ] Increased code complexity
• [ ] Breaking backward compatibility

Related changes

• [ ] Need to cherry-pick to the release branch
• [ ] Need to update the documentation

Release notes:

NONE

[ti-chi-bot[bot]]

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[codecov-commenter]

Codecov Report

:x: Patch coverage is 27.94118% with 49 lines in your changes missing coverage. Please review. :warning: Please upload report for BASE (feature/fts@5e178b3). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
components/playground/main.go	37.50%	19 Missing and 1 partial :warning:
components/playground/playground.go	21.43%	7 Missing and 4 partials :warning:
components/playground/instance/tiflash_config.go	0.00%	6 Missing :warning:
components/playground/instance/tiflash.go	0.00%	1 Missing and 2 partials :warning:
components/playground/instance/pd_config.go	0.00%	0 Missing and 2 partials :warning:
components/playground/instance/tici_meta_config.go	0.00%	2 Missing :warning:
components/playground/instance/tikv_config.go	0.00%	0 Missing and 2 partials :warning:
components/playground/instance/tikv_worker.go	0.00%	2 Missing :warning:
components/playground/instance/tidb_config.go	0.00%	1 Missing :warning:

Additional details and impacted files

@@              Coverage Diff               @@
##             feature/fts    #2651   +/-   ##
==============================================
  Coverage               ?   47.80%           
==============================================
  Files                  ?      344           
  Lines                  ?    36923           
  Branches               ?        0           
==============================================
  Hits                   ?    17648           
  Misses                 ?    17099           
  Partials               ?     2176           

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