message: add sql always encrypted settings
diff: "encryptedCredential": {
  "type": "object",
  "description": "The encrypted credential used for authentication. Credentials are encrypted using the integration runtime credential manager. Type: string (or Expression with resultType string)."
  + },
  + "alwaysEncryptedSettings": {
  + "$ref": "#/definitions/SqlAlwaysEncryptedProperties",
  + "description": "Sql always encrypted properties."
  }
  },
  "required": [
  "encryptedCredential": {
  "type": "object",
  "description": "The encrypted credential used for authentication. Credentials are encrypted using the integration runtime credential manager. Type: string (or Expression with resultType string)."
  + },
  + "alwaysEncryptedSettings": {
  + "$ref": "#/definitions/SqlAlwaysEncryptedProperties",
  + "description": "Sql always encrypted properties."
  }
  },
  "required": [
  "encryptedCredential": {
  "type": "object",
  "description": "The encrypted credential used for authentication. Credentials are encrypted using the integration runtime credential manager. Type: string (or Expression with resultType string)."
  + },
  + "alwaysEncryptedSettings": {
  + "$ref": "#/definitions/SqlAlwaysEncryptedProperties",
  + "description": "Sql always encrypted properties."
  }
  },
  "required": [
  "connectionString"
  ]
  },
  + "SqlAlwaysEncryptedProperties": {
  + "description": "Sql always encrypted properties.",
  + "properties": {
  + "alwaysEncryptedAkvAuthType": {
  + "x-ms-enum": {
  + "name": "SqlAlwaysEncryptedAkvAuthType",
  + "modelAsString": true
  + },
  + "enum": [
  + "ServicePrincipal",
  + "ManagedIdentity"
  + ],
  + "type": "string",
  + "description": "Sql always encrypted AKV authentication type. Type: string (or Expression with resultType string)."
  + },
  + "servicePrincipalId": {
  + "type": "object",
  + "description": "The client ID of the application in Azure Active Directory used for Azure Key Vault authentication. Type: string (or Expression with resultType string)."
  + },
  + "servicePrincipalKey": {
  + "$ref": "../datafactory.json#/definitions/SecretBase",
  + "description": "The key of the service principal used to authenticate against Azure Key Vault."
  + }
  + },
  + "required": [
  + "alwaysEncryptedAkvAuthType"
  + ]
  + },
  "AzureBatchLinkedService": {
  "x-ms-discriminator-value": "AzureBatch",
  "description": "Azure Batch linked service.",
  