New Regions for Heroku Common Runtime

### Required Terms

- [X] I agree to follow this project's [Code of Conduct](https://github.com/heroku/roadmap/blob/main/CODE_OF_CONDUCT.md)
- [X] I have read and accept the [Salesforce Program Agreement](https://www.salesforce.com/company/program-agreement/)

### What service(s) is this request for?

Heroku dynos, Heroku Data, Common Runtime

### Tell us about what you're trying to solve. What challenges are you facing?

This year, we've started Heroku [Regional Expansion with our Private Spaces Product for Mumbai, Montreal](https://blog.heroku.com/private-spaces-expand-to-mumbai-and-montreal), Singapore, and London (with the full GA date later this year). New regions for the common runtime have been something internally we've been eager to enable. Now, we've also seen a significant amount of interest from customers for new online regions now that started including more for the Private Spaces product.

We are currently in the research phase to add these regions, but I would like to hear from any customers about which specific regions they would like brought to the common runtime. Currently, there are only options to run your dynos in the US (us-east-1) and EU (eu-west-1), we are working to have parity across both offerings, but in order to help the sequencing of priority of which region we open first, please comment in the issue here and feel free to tag me.

For reference, here are the current Private Spaces regions (with the additional that will be added in 2023). We will ideally start with a region from this list.

```
dublin Dublin, Ireland Private Spaces
frankfurt Frankfurt, Germany Private Spaces
montreal Montreal, Canada Private Spaces
mumbai Mumbai, India Private Spaces
oregon Oregon, United States Private Spaces
sydney Sydney, Australia Private Spaces
tokyo Tokyo, Japan Private Spaces
virginia Virginia, United States Private Spaces
london London, United Kingdom Private Spaces
singapore Singpore, Singapore Private Spaces
```