feat(ruby): improve wire test generation with client reuse and AST-level snippet handling

[iamnamananand996]

Description

Linear ticket: Closes FER-7955

Implements three improvements to Ruby SDK wire test generation:

1. Client reuse: The client is now instantiated once in a setup method and stored in @client, following the PHP/Python pattern for better performance
2. AST-level snippet handling: Replaced fragile regex-based snippet patching with AST-level code generation using a new skipClientInstantiation option
3. Centralized test utilities: Helper methods are now generated in a shared WireMockTestCase base class (following PHP/Python pattern), reducing code duplication across test files

Link to Devin run: https://app.devin.ai/sessions/6e5c0237738043a1b60de9c92fdae6e1
Requested by: [email protected] (@iamnamananand996)

Changes Made

• Added skipClientInstantiation option to EndpointSnippetGenerator that generates method calls on existing @client instance variable
• Updated DynamicSnippetsGenerator.generateSnippetAst to accept and pass through options
• Refactored WireTestGenerator to:
  • Generate a setup method that creates @client with auth and base_url
  • Use snippetAst instead of string snippets in test cases
  • Remove ~270 lines of regex-based methods (processSnippetForWireMock, injectAuthIntoSnippet, injectBaseUrlIntoRequestOptions, etc.)
  • Inherit from WireMockTestCase instead of Minitest::Test
• Updated WireTestSetupGenerator to generate wiremock_test_case.rb base class containing:
  • WIREMOCK_BASE_URL and WIREMOCK_ADMIN_URL constants
  • Skip logic for wire tests (RUN_WIRE_TESTS env var check)
  • verify_request_count helper method
  • Docker healthcheck configuration

Testing

• Lint checks pass (pnpm run check)
• Compilation succeeds (pnpm compile)
• Seed tests pass for exhaustive and examples fixtures with wire-tests enabled
• Generated test files verified to inherit from WireMockTestCase correctly

Human Review Checklist

• Verify WireMockTestCase base class is generated with correct Ruby syntax and documentation
• Verify test files properly use require_relative "wiremock_test_case" and inherit from WireMockTestCase
• Verify auth handling in setup method works for all auth schemes (bearer, header, basic, oauth, inferred)
• Verify X-Test-Id header is properly passed through request_options in generated tests

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