Changes to List tool executions

the toolExecutions/items/status response's property type changed from string to no type for status 200

added JobStatus subschema #2 to the toolExecutions/items/status response property anyOf list for the response status 200

removed the cancelled enum value from the toolExecutions/items/status response property for the response status 200

removed the failed enum value from the toolExecutions/items/status response property for the response status 200

removed the pending enum value from the toolExecutions/items/status response property for the response status 200

removed the running enum value from the toolExecutions/items/status response property for the response status 200

removed the succeeded enum value from the toolExecutions/items/status response property for the response status 200