fix(query): avoid S3 notification standalone target FPs

[omribz156]

Closes #8052

Reason for Proposed Changes

• The S3 bucket notification query flagged standalone SNS/SQS/Lambda resources when no aws_s3_bucket_notification existed in the file, which creates false positives for unrelated resources.

Proposed Changes

• Removed the branch that treats every standalone SNS/SQS/Lambda resource as missing an S3 bucket notification.
• Kept the existing checks for target resources that are present but not referenced by an existing aws_s3_bucket_notification.
• Moved the standalone SNS/SQS/Lambda fixtures from positive cases to negative cases.

Verification

• go test ./test -run "TestQueries/.*s3_bucket_notifications_disabled.*" -count=1 -timeout 10m -v
• git diff --check

This was implemented with Codex assistance, with the final patch manually reviewed and kept focused on the query regression.

I submit this contribution under the Apache-2.0 license.