x/build: invalid SSL certificates for perf.golang.org during migration

[prattmic]

As part of #48803, we are making various improvements to https://perf.golang.org, including moving this service to the same infrastructure used by https://build.golang.org and others.

This migration is taking place this week with a DNS update to perf.golang.org. The new infrastructure will not provision SSL certificates for perf.golang.org until this DNS change completes rolling out. As a result, you may see invalid SSL certificate warnings [1] if you receive the updated DNS records prior to certificate provisioning.

https://perf.golang.org is a low traffic service so we do not expect this to affect many users.

Note that the performance storage service (contacted by tools like benchsave), https://perfdata.golang.org, is not affected by this migration and will remain accessible. This service can be contacted directly as a workaround for accessing benchmark results. e.g., https://perf.golang.org/search?q=upload:20220411.10 -> https://perfdata.golang.org/search?q=upload:20220411.10

We expect this roll out to take a few days, and will close this issue once certificate provisioning is complete.

[1] In this period, I believe users will receive a certificate issued to Common Name (CN) gerritbot.golang.org, rather than perf.golang.org.

[prattmic]

New certificates are provisioned and working.