Add quota_region_override for quotas that report in us-east-1 only

[taraspos]

Summary

AWS S3 is a global service and default quota value is reported from us-east-1 only. Added quota_region_override=us-east-1 to be able to fetch it.

AWS CLI Example:

➜  aws-quota-checker git:(taras/add-quota-region-override) aws service-quotas get-aws-default-service-quota --service-code s3 --quota-code L-DC2B2D3D --region us-east-1
{
    "Quota": {
        "ServiceCode": "s3",
        "ServiceName": "Amazon Simple Storage Service (Amazon S3)",
        "QuotaArn": "arn:aws:servicequotas:::s3/L-DC2B2D3D",
        "QuotaCode": "L-DC2B2D3D",
        "QuotaName": "General purpose buckets",
        "Value": 10000.0,
        "Unit": "None",
        "Adjustable": true,
        "GlobalQuota": true,
        "UsageMetric": {
            "MetricNamespace": "AWS/Usage",
            "MetricName": "ResourceCount",
            "MetricDimensions": {
                "Class": "None",
                "Resource": "GeneralPurposeBuckets",
                "Service": "S3",
                "Type": "Resource"
            },
            "MetricStatisticRecommendation": "Maximum"
        },
        "Period": {
            "PeriodValue": 5,
            "PeriodUnit": "MINUTE"
        }
    }
}
➜  aws-quota-checker git:(taras/add-quota-region-override) aws service-quotas get-aws-default-service-quota --service-code s3 --quota-code L-DC2B2D3D --region us-west-2

An error occurred (NoSuchResourceException) when calling the GetAWSDefaultServiceQuota operation:

• Service Quotas for S3 aws/aws-cli#7962
• Listing S3 Service quota via cli not working  aws/aws-cli#8238

Resolves #45