Changes to Search ATCs by title and tags

added the new optional query request parameter priority

added the new optional query request parameter technique

added the new test_outside_plan_project enum value to the error/code response property for the response status 401

added the new test_outside_plan_project enum value to the error/code response property for the response status 403

added the new test_outside_plan_project enum value to the error/code response property for the response status 422

removed the test_outside_plan_project enum value from the error/code response property for the response status 401

removed the test_outside_plan_project enum value from the error/code response property for the response status 403

removed the test_outside_plan_project enum value from the error/code response property for the response status 422

added the new test_outside_plan_project enum value to the error/code response property for the response status 401

added the new test_outside_plan_project enum value to the error/code response property for the response status 403

added the new test_outside_plan_project enum value to the error/code response property for the response status 422

added the new environment_invalid enum value to the error/code response property for the response status 401

added the new environment_invalid enum value to the error/code response property for the response status 403

added the new environment_invalid enum value to the error/code response property for the response status 422

added the new no_executable_steps enum value to the error/code response property for the response status 401

added the new no_executable_steps enum value to the error/code response property for the response status 403

added the new no_executable_steps enum value to the error/code response property for the response status 422