Corrected the data type for ClaimsToAddOrOverride property in IdTokenGeneration and AccessTokenGeneration classes for CognitoPreTokenGenerationV2Event.

[ashishdhingra]

Issue #, if available: #1798 (additional context https://github.com/aws/aws-lambda-dotnet/discussions/1792)

Description of changes: Corrected the data type for ClaimsToAddOrOverride property in IdTokenGeneration and AccessTokenGeneration classes for CognitoPreTokenGenerationV2Event.

Per Pre token generation Lambda trigger, following is the event structure for V2 event:

{
    "request": {
        "userAttributes": {
            "string": "string"
        },
        "scopes": ["string", "string"],
        "groupConfiguration": {
            "groupsToOverride": ["string", "string"],
            "iamRolesToOverride": ["string", "string"],
            "preferredRole": "string"
        },
        "clientMetadata": {
            "string": "string"
        }
    },
    "response": {
        "claimsAndScopeOverrideDetails": {
            "idTokenGeneration": {
                "claimsToAddOrOverride": {
                    "string": [accepted datatype]
                },
                "claimsToSuppress": ["string", "string"]
            },
            "accessTokenGeneration": {
                "claimsToAddOrOverride": {
                    "string": [accepted datatype]
                },
                "claimsToSuppress": ["string", "string"],
                "scopesToAdd": ["string", "string"],
                "scopesToSuppress": ["string", "string"]
            },
            "groupOverrideDetails": {
                "groupsToOverride": ["string", "string"],
                "iamRolesToOverride": ["string", "string"],
                "preferredRole": "string"
            }
        }
    }
}

Notice that claimsToAddOrOverride for both idTokenGeneration and accessTokenGeneration has structure "string": [accepted datatype], where accepted datatype is one of the following:

• String
• Number
• Boolean
• Array of strings, numbers, booleans, or a combination of any of these
• JSON

IMPORTANT: This is a breaking change and should be called out explicitly in CHANGELOG.

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