[RFC] Supporting Queues / Messaging Pipelines across Cloud Providers (Ex: AWS SQS)

## Feature Request

A commonly used feature in Cloud Platforms is their message-passing/queueing services, such as
* [AWS](https://aws.amazon.com/sqs/): SQS
* [Azure](https://learn.microsoft.com/en-us/azure/service-bus-messaging/service-bus-azure-and-service-bus-queues-compared-contrasted): [Service-Bus, Storage Queues]
* [GCP](https://cloud.google.com/pubsub/docs/choosing-pubsub-or-cloud-tasks): [Cloud Tasks, Cloud Pub-Sub]

These are often used in conjunction with their other services, such as Storage (Ex: to send a message-notification automatically when a new file is uploaded to a Container/Bucket) and Compute (Ex: To pass information between different compute instances, or to take an action whenever a new file is uploaded to Storage). However, it is a pain right now to deal with the different CSP's syntaxes for using these queues, and would be convenient if we could centralize how we carry out at least basic operations like:
1. Read `n` messages from queue
2. Add new messages into the queue
3. Flush the queue / Delete `n` items from the queue

该 issue 没有指出任何仓库文件、测试或入口点。首先定位 Libcloud 的 provider 抽象以及现有的跨 provider resource API，然后比较 AWS、Azure 和 GCP 所列出的基本 queue 操作。完成内容应包括一项达成共识的设计，以及支持在目标 provider 之间读取、添加和删除消息。

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