Provide option to specify the hashing scheme for output topic producers in Pulsar functions

**Is your feature request related to a problem? Please describe.**

Provide option to specify the hashing scheme for output topic producers in Pulsar functions.

**Describe the solution you'd like**
In producer builder there is hashing scheme, expecting similar solution.

**Describe alternatives you've considered**
NA

**Additional context**
NA

Start by tracing the producer builder's existing hashing-scheme option into the Pulsar Functions path that creates output topic producers. Identify how that option is exposed for function outputs and verify that the selected scheme is used; completion should include coverage for the new configuration and its effect on output producers.

Written by the indexing model from the issue text.