Updates to the Clear Linux build cadence

We have been building 2 releases of Clear Linux a day, but due to increasing cycle times, we made the decision this week that would now schedule 1 build per day while we work on our build and validation times.
On the build time front, we have some mixer performance improvements which landed yesterday. Our DevOps team is giving this new release a spin to see how much it helps us. On the validation time front, we are moving our testing into the cloud to increase parallelism so that we can validate all bundles in the distro within an acceptable time frame.
In the future, we are planning to get back to releasing two builds per day.