Summary:
time_source does not have any secrets. Call home info on time_source is useful.

Also, time_source is a non-runtime flag.
Jira: DB-10879

Test Plan:
Jenkins

Backport-through: 2024.2

Reviewers: hsunder, smishra

Reviewed By: hsunder

Subscribers: ybase

Differential Revision: https://phorge.dev.yugabyte.com/D39031