[Offering Access Tied To Account]

### The required feature described as a wish

Hi,

Good day to you.

I wanted to suggest the option to tie any disk or compute offerings to accounts on top of the current option which is tied to zones. This could help me separate compute or disk offerings that uses an SSD datastore from the ones that uses HDD datastore.

Thank you for your time and consideration.

首先审查 CloudStack 当前如何将磁盘和计算 offering 关联到 zone，然后确定基于 account 的资格判断应适合放在哪里。在实现之前，定义应支持的 account、SSD/HDD 数据存储和 offering 选择行为；当 account 能够根据其数据存储需求可靠地获得 offering 时，该功能即告完成。

由索引模型根据 Issue 内容生成。