Adds support for suppressing the periodic "..." printing that can
disrupt normal output stream. This output is still deemed necessary to
include by default for CI systems that might otherwise cancel an update
that goes for a long time without printing anything. But we now have an
option to turn this off.
Notes:
1. We want to expose this via Automtation API, and may even want to
default to off via Automation API?
Fixes https://github.com/pulumi/pulumi/issues/14069.
Related https://github.com/pulumi/pulumi/issues/11139.