Summary:
Trim the algorithm list in the TLS cipher
In some OS'es - we might not have `,` separated values for the algorithms list. This diff handles that case.

Test Plan: Manually verified weak ciphers are not reported for ubuntu VM.

Reviewers: nsingh, anijhawan

Reviewed By: anijhawan

Subscribers: svc_phabricator

Differential Revision: https://phorge.dev.yugabyte.com/D44313