Fix Amazon provider log messages to show actual values

[parkhojeong]

S3 hook: fix missing f-string prefix in the is_keys_unchanged_async success message
DynamoDB sensor: fix missing %s for the attribute name in the "Got:" poke log

Test

S3 hook: breeze run pytest providers/amazon/tests/unit/amazon/aws/hooks/test_s3.py
DynamoDB sensor: breeze run pytest providers/amazon/tests/unit/amazon/aws/sensors/test_dynamodb.py

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