fix invoice view and download links

[stnguyen90]

What does this PR do?

The prefix should be the api endpoint instead of the base path so that the developer goes straight to the API endpoint to view or download their invoice.

Test Plan

Manually tested locally

Related PRs and Issues

None

Have you read the Contributing Guidelines on issues?

Yes

[lohanidamodar]

Hmm, it uses endpoint based route, before we switched to console based routes (#1664), that will redirect to endpoint based routes. However it's already in console we can go either ways, your fix or mine
#1920

[stnguyen90]

Since the user is already in the Console and has access to the invoice, I'd recommend using the api endpoint so we don't incur 2 additional network requests (one for the route and and one for the invoice lookup).

It makes sense to use the console route in the email in case they aren't logged into the Console from where they're opening the email.

[ItzNotABug]

Since the user is already in the Console and has access to the invoice, I'd recommend using the api endpoint so we don't incur 2 additional network requests (one for the route and and one for the invoice lookup).

It makes sense to use the console route in the email in case they aren't logged into the Console from where they're opening the email.

This makes more sense to me to hit the API directly. LGTM.