[ICYMI] Dimension and metric improvements

[Data Studio Developers]

In case you missed it, we've recently made some improvements to how fields in your data sources are defined and aggregated. No action is required on your part, existing reports & data sources should continue to work as before. The main differences going forward are:

1. You will see more green fields in data sources.

2. Some older data sources will have fields marked as "deprecated". See Why do I see "deprecated" fields?

For a detailed explanation of this change, please see this help center post. It explains in greater detail what has changed.

For connector developers, continue to define your getSchema() response as before. There might be some developer doc changes in the future to clarify terms, but no code changes will be required from you. 

If you do find that existing reports & data sources are broken with this change, please file an issue.