* Cloud Monitoring: Update GroupBy fields to use experimental UI components
* let group by field grow horizontally
* remove fixed width constants from inputs
* add test
* Cloud Monitoring: Update GraphPeriod to use experimental UI components (#50545)
* Cloud Monitoring: Update GraphPeriod to use experimental UI components
* Cloud Monitoring: Update Preprocessing to use experimental UI components (#50548)
* Cloud Monitoring: Update Preprocessing to use experimental UI components
* add tests
* make overrides optional
* move preprocessor back into its own row
