Move `--log-level-stderr=warn` to pgBackRest's configuration file for `16/edge`

[marceloneppel]

Move --log-level-stderr=warn to pgBackRest's configuration file, as described at #1320 (comment).

#1353 is being worked on top of the main branch (14/edge).

[syncronize-issues-to-jira]

Thank you for reporting your feedback to us!

The internal ticket has been created: https://warthogs.atlassian.net/browse/DPE-10394.

This message was autogenerated

[syncronize-issues-to-jira]

Thank you for reporting your feedback to us!

The internal ticket has been created: https://warthogs.atlassian.net/browse/DPE-10395.

This message was autogenerated

[Yemintun90]

Hi, I'm a first-time contributor. Could you please assign this issue to me?

[marceloneppel]

Hi, @Yemintun90! Sure thing. When you have a PR ready for review we'll take a look at it.