Some release script fixes (#20718)

* Retry loop should not start over from beginning

When the otp times out, we should not retry the packages that were
already successfully published. We should pick up where we left off.

* Don't crash if build-info.json doesn't exist

The "print follow up instructions" step crashes if build-info.json is
not found. The new build workflow doesn't include those yet (might not
need to) and since the instructions that depend on it only affect
semver (latest) releases, I've moved the code to that branch. Will
follow up with a proper fix, either by adding back a build-info.json
file or removing that dependency and reading the commit some other way.