[Request] show public endpoint of Amplify Functions

**Is your feature request related to a problem? Please describe.**

currently, in the Functions section of the Amplify Console, i can see "Functions added" and "Logs", then links to AWS Lambda and CloudWatch. This looks like a private lambda, with no indication of API Gateway on top of it. I have no idea what the actual public endpoint looks like.

**Describe the solution you'd like**

This detail could be inferred from implicit knowledge but the console should also make it explicit.

As a frontend developer, this is useful as:

- I might want to ping my endpoint without using [`API.get`](https://docs.amplify.aws/lib/restapi/fetch/q/platform/js#get-requests)
- it takes out the guesswork of knowing what the public endpoint path is so i can code against it
- I can click on it as a very rudimentary form of testing (i know that i have to do further testing inside the AWS Lambda UI or with `amplify mock`)



Start in the Functions section of the Amplify Console and review how its existing AWS Lambda and CloudWatch links are presented. Trace where API Gateway information could be surfaced for a function, then verify that the public endpoint is visible and usable as a clickable link without relying on API.get.

Written by the indexing model from the issue text.