Move excessive errors logs to debug

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Description

This PR moves some of the ERROR logging in attribute subscriptions to DEBUG. Kind of a followup of this MR

Motivation

Recently we've noticed a lot of error logs that are simply attribute reading errors and they are not errors from TangoGQL's point of view.

Fixes:

Changes:

Tests included/Docs Updated?

• Included for each change/fix?
• Passing? (Merge will not be approved unless this is checked)
• Docs updated?
• New packages used/requires npm install?
• Toggle added for new features?