Fix protocol tests with new changes to CBOR and Rest

[mullermp]

Also a refactor of Cbor engine into the RpcV2 namespace

[github-actions]

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[github-actions]

Detected 17 possible performance regressions:

• aws-sdk-cloudwatchlogs.client_init_ms - z-score regression: 0.71 -> 1.46. Z-score: 16.1
• aws-sdk-cloudwatchlogs.put_log_events_small_ms - z-score regression: 0.46 -> 0.61. Z-score: 21.38
• aws-sdk-cloudwatchlogs.get_log_events_small_ms - z-score regression: 0.34 -> 0.48. Z-score: 29.94
• aws-sdk-cloudwatch.client_init_ms - z-score regression: 0.68 -> 1.19. Z-score: 21.47
• aws-sdk-cloudwatch.put_metric_data_small_ms - z-score regression: 0.47 -> 1.07. Z-score: 57.53
• aws-sdk-sns.client_init_ms - z-score regression: 0.65 -> 1.13. Z-score: 22.37
• aws-sdk-sns.publish_small_ms - z-score regression: 0.45 -> 0.84. Z-score: 33.32
• aws-sdk-sns.publish_large_ms - z-score regression: 2.82 -> 4.38. Z-score: 19.04
• aws-sdk-s3.client_init_ms - z-score regression: 0.91 -> 1.75. Z-score: 31.71
• aws-sdk-s3.get_object_small_ms - z-score regression: 0.45 -> 0.73. Z-score: 21.06
• aws-sdk-s3.put_object_small_ms - z-score regression: 0.6 -> 1.58. Z-score: 61.19
• aws-sdk-s3.head_object_ms - z-score regression: 0.79 -> 2.04. Z-score: 67.73
• aws-sdk-dynamodb.client_init_ms - z-score regression: 0.7 -> 1.31. Z-score: 27.63
• aws-sdk-dynamodb.put_item_small_ms - z-score regression: 0.58 -> 1.18. Z-score: 36.15
• aws-sdk-kinesis.client_init_ms - z-score regression: 0.69 -> 1.36. Z-score: 19.22
• aws-sdk-kinesis.put_record_small_ms - z-score regression: 0.37 -> 0.6. Z-score: 20.96
• aws-sdk-kinesis.put_record_large_ms - z-score regression: 0.5 -> 1.37. Z-score: 53.2