Add another configuration map for data residency configuration

[zhongduo]

Problem
This configuration will be used to support #1678. But since the data residency itself is small, here are two possible ways:

1. create one for generic configuration in eventing so that new configurations can be added.
2. create one for data residency only.

Persona:
Which persona is this feature for?

Exit Criteria
A new config map in clound-run-events namespace.

Time Estimate (optional):
How many developer-days do you think this may take to resolve?

Additional context (optional)
Add any other context about the feature request here.