fix: pg prom metrics not getting exported when pg query logging is disabled

[vishal-dt]

Description

PG prom metrics not getting exported when PG query logging is disabled. Move out the PG prom metrics export of the PG log query block

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Checklist:

• The title of the PR states what changed and the related issues number (used for the release note).
• Does this PR requires documentation updates?
• I've updated documentation as required by this PR.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
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Does this PR introduce a user-facing change?

[sonarqubecloud]

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