Improve documentation for tLSClientConfig

[diegolovison]

Description of your changes:

GoDoc-style comment for your tLSClientConfig function

Testing instructions

NA

Checklist

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[openshift-ci]

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[VaniHaripriya]

/lgtm