Lithops

Fixed
- [Core] Prevent lithops waiting forever for the proxy ready
- [Core] Multiprocessing invoker in MAC OS
- [Knative] Istio endpoint issue in knative backend

Changed
- [Core] Improved standalone executor logic
- [Knative] Updated apiVersion to v1
- [Knative] Updated default python3.8 Dockerfile

Fixed
- [Core] Fixed runtime_memory param in API calls
- [Core] Raise fn exceptions immediately when produced
- [Core] Raise exceptions during fn invocation
- [IBM COS] Get tokens for IAM API key and COS API Key
- [AWS Lambda] Fixes in Lambda compute backend

Added
- [Core] New ServerlessExecutor
- [Core] New StandaloneExecutor
- [Core] New LocalhostExecutor
- [Core] New StandaloneExecutor logic
- [Core] New LocalhostExecutor logic
- [Core] New Standalone invoker logic
- [Core] New Localhost invoker logic

Changed
- [Core] Changed some main keys in configuration

Changed
- [CodeEngine] Improved Code engine backend

Added
- [Core] Google Cloud Functions & Storage backends
- [Core] Azure Functions & Blob Storage backends
- [Core] AWS Lambda & AWS S3 backends
- [Core] Alibaba Aliyun Functions & Object Storage backends
- [Core] IBM Code Engine Compute backend

Changed
- [Core] Rebranding to LITHOPS