fix:[2.4]GrowingDataGetter get the wrong string data

[cqy123456]

issue: #37994
master pr: #38015

[cqy123456]

/hold

[mergify]

@cqy123456 Please associate the related pr of master to the body of your Pull Request. (eg. “pr: #”)

[cqy123456]

/unhold

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 72.30%. Comparing base (4aca68a) to head (7e4677d).
Report is 13 commits behind head on 2.4.

Files with missing lines	Patch %	Lines
internal/core/src/query/GroupByOperator.h	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4   #37995      +/-   ##
==========================================
+ Coverage   72.24%   72.30%   +0.05%     
==========================================
  Files        1069     1070       +1     
  Lines      166979   167428     +449     
==========================================
+ Hits       120641   121060     +419     
- Misses      41919    41942      +23     
- Partials     4419     4426       +7     

Files with missing lines	Coverage Δ
internal/core/src/query/GroupByOperator.h	0.00% <0.00%> (ø)

... and 53 files with indirect coverage changes

[czs007]

/approve
/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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