Add tests for Cpprestsdk client in CircleCI

[wing328]

PR checklist

• Read the contribution guidelines.
• Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
• Run the following to build the project and update samples:

  ./mvnw clean package 
  ./bin/generate-samples.sh ./bin/configs/*.yaml
  ./bin/utils/export_docs_generators.sh
  

  (For Windows users, please run the script in Git BASH)
  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
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  IMPORTANT: Do NOT purge/delete any folders/files (e.g. tests) when regenerating the samples as manually written tests may be removed.
• File the PR against the correct branch: master (upcoming 7.6.0 minor release - breaking changes with fallbacks), 8.0.x (breaking changes without fallbacks)
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[wing328]

build passed

[ 60%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/Category.cpp.o
[ 65%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/Order.cpp.o
[ 69%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/Pet.cpp.o
[ 73%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/Pet_vaccinationBook.cpp.o
[ 78%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/SchemaWithSet.cpp.o
[ 82%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/SchemaWithSet_vaccinationBook.cpp.o
[ 86%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/Tag.cpp.o
[ 91%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/User.cpp.o
[ 95%] Building CXX object CMakeFiles/CppRestPetstoreClient.dir/src/model/Vaccine.cpp.o
[100%] Linking CXX static library libCppRestPetstoreClient.a
[100%] Built target CppRestPetstoreClient
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  01:00 min
[INFO] Finished at: 2024-06-01T09:23:48Z
[INFO] ------------------------------------------------------------------------
[INFO] 3 goals, 3 executed