test: simplify integration_tests/charts/api_tests.py

[sebastianliebscher]

SUMMARY

This PR simplifies integration_tests/charts/api_tests.py by parameterizing some tests that basically do the same.
Additional tests added to cover an empty filter value for chart_all_text, chart_has_created_by and chart_is_certified.

TESTING INSTRUCTIONS

scripts/tests/run.sh --module tests/integration_tests/charts/api_tests.py

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[rusackas]

Hey @sebastianliebscher - hope all is well. Are you still around and able to give this a rebase and help it pass E2E tests? I'll go ahead and convert it to a draft for now. You're very much on track to be a committer, please reach out onslack if you're interested in that opportunity.