[Tables] Create a cosmosdb decorator to run tables test against cosmosdb endpoint

[seankane-msft]

• Create a new decorator for accessing the tables endpoint
• Add the new CosmosAccountPreparer to the storage_account method
• Location of the StorageAccountPreparer which is a basis for the new CosmosAccountPreparer
• create a management client
• Method to create_or_update a cosmos account
• class that takes in the parameters to update a cosmos db database account
• Capability model that needs to be set to "EnableTable" for cosmos to emulate tables
• Sample HTTP request when creating a new tables account. Important are kind, databaseAccountOfferType, capabilities

{
    "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "name": {
            "type": "string"
        },
        "location": {
            "type": "string"
        },
        "locationName": {
            "type": "string"
        },
        "defaultExperience": {
            "type": "string"
        },
        "isZoneRedundant": {
            "type": "string"
        }
    },
    "variables": {},
    "resources": [
        {
            "apiVersion": "2020-04-01",
            "kind": "GlobalDocumentDB",
            "type": "Microsoft.DocumentDb/databaseAccounts",
            "name": "[parameters('name')]",
            "location": "[parameters('location')]",
            "properties": {
                "databaseAccountOfferType": "Standard",
                "locations": [
                    {
                        "id": "[concat(parameters('name'), '-', parameters('location'))]",
                        "failoverPriority": 0,
                        "locationName": "[parameters('locationName')]"
                    }
                ],
                "backupPolicy": {
                    "type": "Periodic",
                    "periodicModeProperties": {
                        "backupIntervalInMinutes": 240,
                        "backupRetentionIntervalInHours": 8
                    }
                },
                "isVirtualNetworkFilterEnabled": false,
                "virtualNetworkRules": [],
                "ipRules": [],
                "dependsOn": [],
                "enableMultipleWriteLocations": false,
                "capabilities": [
                    {
                        "name": "EnableTable"
                    }
                ],
                "enableFreeTier": false
            },
            "tags": {
                "defaultExperience": "[parameters('defaultExperience')]",
                "hidden-cosmos-mmspecial": "",
                "CosmosAccountType": "Non-Production"
            }
        }
    ],
    "outputs": {}
}