API fuzz - configuration screen - Wire up BE and FE

• Main issue: #299234 (closed)

Reflect backend review feedback in the frontend:

• The CreateApiFuzzingCiConfigurationInput type was renamed to ApiFuzzingCiConfigurationCreateInput.
• The createApiFuzzingCiConfiguration mutation was renamed to apiFuzzingCiConfigurationCreate.
• The gitlabCiYamlEditUrl field was renamed to gitlabCiYamlEditPath.