store userMetadata on write operations

[resulyrt93]

Description

With spark deltalake we can store userMetadata with write operations, thus we can access them in delta history. It can be an arbitrary json data. Is there a way to store it with delta-rs python binding? Doc link

Use Case In our case, we want to store user data with write operation to match transaction with user.

Related Issue(s) https://github.com/delta-io/delta-rs/issues/133