Add petstore tests in groovy workflow

[wing328]

• Add petstore tests in groovy workflow Add petstore tests in groovy workflow #22936
• Comment out certain tests no longer functioning as expected

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 || exit
  ./bin/generate-samples.sh ./bin/configs/*.yaml || exit
  ./bin/utils/export_docs_generators.sh || exit
  

  (For Windows users, please run the script in WSL)
  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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  You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*.
  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.x.0 minor release - breaking changes with fallbacks), 8.0.x (breaking changes without fallbacks)
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Summary by cubic

Run Groovy Petstore tests in CI by starting a local swaggerapi/petstore container (localhost:80 -> /v2) and running ./gradlew build to execute tests against a localhost OpenAPI spec.

Point Groovy client basePath to http://localhost/v2, switch inputSpec to modules/openapi-generator/src/test/resources/3_0/groovy/petstore.yaml, disable findPetsByStatus and related status assertions in update tests, comment out the post-update getPetById verification, and tidy .openapi-generator-ignore.

^{Written for commit 56940ec. Summary will update on new commits.}

[cubic-dev-ai]

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