Lithops-2.5.6

Added

• [AWS_EC2] Added AWS EC2 Standalone backend, by @JosepSampe
• [AWS_EC2] Allow to start workers using Spot instances in AWS EC2 Standalone backend, by @JosepSampe
• [Standalone] Added the logic to create the missing delta of workers in reuse mode, by @kpavel
• [Standalone] Cancel running job tasks on ctrl-c, by @JosepSampe
• [Standalone] New logic to verify that the master VM is correctly setup, by @kpavel
• [Standalone] Added new command "lithops attach" that allows to create live ssh connections to the master VM, by @JosepSampe
• [Config] Allow to set monitoring_interval in config, by @JosepSampe

Changed

• [Standalone] Improved the performance of the master VM when getting the free available workers (reuse mode), by @JosepSampe

Fixed

• [Standalone] Fixed VM initial installation script, by @kpavel
• [Standalone] Fixed get_workers method on master, by @kpavel
• [Standalone] Deleted unnecessary extra worker, by @JosepSampe
• [Standalone] Ensure all workers are properly started on reuse mode, by @JosepSampe
• [Localhost] Fixed storage delete_objects method that was deleting the entire folder of a file, by @JosepSampe
• [IBM VPC] General fixes in IBM VPC backend, by @JosepSampe