possibility to filter Namespaces

[yanlibert]

We are implementing Marquez at scale, and we often end up with the creation of a lot of namespaces containing neither datasets nor jobs.
This can be caused by the handling of symlinks (see this issue) or an issue with the open lineage integrations.
We would like to add the possibilty to filter the list of namespaces returned by the API by providing a regex in the marquez.yml config file
Exemple

namespaceFilter: "foo*"

A PR is on the way to propose this feature

[boring-cyborg]

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