[COPS-6607] expose useful UDF settings for Cassandra

[rishabh96b]

Jira Ticket

COPS-6607

Description

This PR adds some useful UDF settings for Cassandra along with their default values as mentioned below:

enable_user_defined_functions_threads: true
user_defined_function_warn_micros: 500
user_defined_function_fail_micros: 10000
user_defined_function_warn_heap_mb: 200
user_defined_function_fail_heap_mb: 500
user_function_timeout_policy: die

[rishabh96b]

@kaiwalyajoshi can you merge this? Not sure that checks will be reported anytime soon.

[DominikDary]

HDFS Integration tests are green, but status is not reported back to github.
/cc @orsenthil

[DominikDary]

@rishabh96b and myself had a discussion about what to do with this PR and if it should land even that there are failing tests.

His guidance would be to merge it.
@kaiwalyajoshi do you have permissions to do it?

[kaiwalyajoshi]

@DominikDary @rishabh96b
I have a few fixes inflight in #3321 which I want to land before restarting and merging this PR. Stay tuned.