[Audit Manager] - [Coverage] - Support AWS::AuditManager::Control

### Name of the resource

AWS::AuditManager::Assessment

### Resource name

AWS::AuditManager::Control

### Description

Currently there are no CloudFormation resource type for AuditManager Control. It will be good if there is native support for it.

```
Type: AWS::AuditManager::Control
Properties:
Name: String
Description: String
TestingInformation: String
ActionPlanTitle: String
ActionPlanInstructions: String
ControlMappingSources:
- ControlMappingSource
Tags:
- Tag
```

```
Property: ControlMappingSource

SourceName: String
SourceDescription: String
SourceSetUpOptoin: 'System_Controls_Mapping'|'Procedural_Controls_Mapping'
SourceType: 'AWS_Cloudtrail'|'AWS_Config'|'AWS_Security_Hub'|'AWS_API_Call'|'MANUAL'|'Common_Control'|'Core_Control',
SourceKeyword: SourceKeyword
SourceFequency: 'DAILY'|'WEEKLY'|'MONTHLY'
TroubleshootingText: String

Property: SourceKeyword

KeywordInputType: 'SELECT_FROM_LIST'|'UPLOAD_FILE'|'INPUT_TEXT'
KeywordValue: String
```

Source:
* https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/auditmanager/client/create_control.html
* https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/auditmanager/client/update_control.html

### Other Details

_No response_

Start with the boto3 create_control and update_control references linked in the issue, then inspect the repository's existing CloudFormation coverage process for similar resources. Done means native support exists for AWS::AuditManager::Control with the listed properties, nested ControlMappingSource and SourceKeyword structures, and the specified enum values.

Written by the indexing model from the issue text.