Add missing EC2 instances:  g6*, r7i

## Problem

We are missing data for the following EC2 instance types:

```
g6.xlarge
g6.2xlarge
g6.4xlarge
g6.8xlarge
g6.16xlarge

g6e.xlarge
g6e.2xlarge
g6e.4xlarge
g6e.8xlarge
g6e.16xlarge

gr6.4xlarge
gr6.8xlarge

r7i.large
r7i.xlarge
r7i.2xlarge
r7i.4xlarge
r7i.8xlarge
r7i.12xlarge
```

## Solution

I will add the corresponding data in a PR soon


