fix: make TanStack Query plugin work with class-based services

[mrlubos]

Closes #1090

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🦋 Changeset detected

Latest commit: b6e350a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@hey-api/openapi-ts	Patch

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commit: b6e350a

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Codecov Report

Attention: Patch coverage is 64.70588% with 18 lines in your changes missing coverage. Please review.

Project coverage is 81.14%. Comparing base (867682d) to head (b6e350a).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...napi-ts/src/plugins/@tanstack/query-core/plugin.ts	10.52%	17 Missing ⚠️
packages/openapi-ts/src/generate/transformers.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1096      +/-   ##
==========================================
- Coverage   81.21%   81.14%   -0.08%     
==========================================
  Files         102      102              
  Lines       11506    11540      +34     
  Branches     1232     1234       +2     
==========================================
+ Hits         9345     9364      +19     
- Misses       2158     2173      +15     
  Partials        3        3              

Flag	Coverage Δ
unittests	81.14% <64.70%> (-0.08%)	⬇️

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