DynamoDB controller cannot update any Table information if provisionedThroughput contains the original values

[rbranche]

Describe the bug
DynamoDB controller cannot update any Table information if provisionedThroughput contains the original values

Steps to reproduce

1. Create Table object

apiVersion: dynamodb.services.k8s.aws/v1alpha1
kind: Table
metadata:
  name: mytable
spec:
  tableName: mytable
  attributeDefinitions:
    - attributeName: field
      attributeType: S
  keySchema:
    - attributeName: field
      keyType: HASH
  provisionedThroughput:
    readCapacityUnits: 25
    writeCapacityUnits: 25

2. Try to add new Global Secondary Indexes to Table object

apiVersion: dynamodb.services.k8s.aws/v1alpha1
kind: Table
metadata:
  name: mytable
spec:
  tableName: mytable
  attributeDefinitions:
    - attributeName: field
      attributeType: S
  globalSecondaryIndexes:
    - indexName: field-index
      keySchema:
        - attributeName: field
          keyType: HASH
      projection:
        projectionType: KEYS_ONLY
      provisionedThroughput:
        readCapacityUnits: 25
        writeCapacityUnits: 25
  keySchema:
    - attributeName: field
      keyType: HASH
  provisionedThroughput:
    readCapacityUnits: 25
    writeCapacityUnits: 25

3. Controller fails to update Table with new GSI because spec.provisionedThroughput values didn't change

│     Message:            ValidationException: The provisioned throughput for the table will not change. The requested value equals the current value. Current ReadCapacityUnits provisioned for the tab │
│ le: 25. Requested ReadCapacityUnits: 25. Current WriteCapacityUnits provisioned for the table: 25. Requested WriteCapacityUnits: 25. Refer to the Amazon DynamoDB Developer Guide for current limits a │
│ nd how to request higher limits.                                                                                                                                                                       │
│                         status code: 400, request id: EFUN8JOS0NKP1NCISHIMPGHR07VV4KQNSO5AEMVJF66Q9ASUAAJG

Expected outcome
GSI for Table is created properly

Environment

• Kubernetes version: 1.21
• Using EKS (yes/no), if so version? 2
• AWS service targeted (S3, RDS, etc.) DynamoDB

[a-hilaly]

Hey @rbranche, this is currently part of #1029 - all the fields will support updates once it's closed

[rbranche]

Thanks @a-hilaly. Duplicate of #1029.