fix: fix pgbackrest script to use proper console log level

[keithf4]

Description

Fix the pgbackrest-info.sh script to force the info console log level so that it gets the expected output format no matter what log level the user may have in the backrest config

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• Bugfix
• Enhancement
• Breaking Change
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closes #401

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Testing

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Checklist:

• I have made corresponding changes to:
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