fix(nat): [123456789] nat gateway remove max limit of eips (#3097)

* remove max limit of eips

* remove max limit of eips

Author: hellertang

.changelog/3097.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+resource/tencentcloud_nat_gateway: remove max limit of eips
+```

tencentcloud/services/vpc/resource_tc_nat_gateway.go

@@ -63,8 +63,7 @@ func ResourceTencentCloudNatGateway() *schema.Resource {
 					ValidateFunc: tccommon.ValidateIp,
 				},
 				MinItems:    1,
-				MaxItems:    10,
-				Description: "EIP IP address set bound to the gateway. The value of at least 1 and at most 10.",
+				Description: "EIP IP address set bound to the gateway. The value of at least 1 and at most 10 if do not apply for a whitelist.",
 			},
 			"zone": {
 				Type:        schema.TypeString,

website/docs/r/nat_gateway.html.markdown

@@ -114,7 +114,7 @@ resource "tencentcloud_nat_gateway" "example" {
 
 The following arguments are supported:
 
-* `assigned_eip_set` - (Required, Set: [`String`]) EIP IP address set bound to the gateway. The value of at least 1 and at most 10.
+* `assigned_eip_set` - (Required, Set: [`String`]) EIP IP address set bound to the gateway. The value of at least 1 and at most 10 if do not apply for a whitelist.
 * `name` - (Required, String) Name of the NAT gateway.
 * `vpc_id` - (Required, String, ForceNew) ID of the vpc.
 * `bandwidth` - (Optional, Int) The maximum public network output bandwidth of NAT gateway (unit: Mbps). Valid values: `20`, `50`, `100`, `200`, `500`, `1000`, `2000`, `5000`. Default is `100`. When the value of parameter `nat_product_version` is 2, which is the standard NAT type, this parameter does not need to be filled in and defaults to `5000`.