Keep a copy of current integration test results in known location (#5998)
### Description
A very small change so that we keep a copy of the Next.js integration
test results in a known location. We'll continue to have a copy of the
results with a unique identifier, but having a known location allows me
to easily download the JSON for syncing the results back to the Next.js
CI suite.
### Testing Instructions
Closes WEB-1629