remote_storage/abs: count 404 and 304 for get as ok for metrics #9912
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Problem
We currently see elevated levels of errors for GetBlob requests. This is because 404 and 304 are counted as errors for metric reporting.
Summary of Changes
Bring the implementation in line with the S3 client and treat 404 and 304 responses as ok for metric purposes.
Related: https://github.com/neondatabase/cloud/issues/20666