docs: add dualstack cluster support documentation

Add new dualstack cluster template and documentation updates
for IPv6 and dualstack cluster configurations. Additionally, docs for
configuring API LB's target group IP type is also added.

New cluster templates and calico manifest are included for creating
dualstack clusters.

Author: tthvo

api/v1beta2/network_types.go

@@ -481,6 +481,7 @@ type IPAMPool struct {
 	// The netmask length of the IPv4 CIDR you want to allocate to VPC from
 	// an Amazon VPC IP Address Manager (IPAM) pool.
 	// Defaults to /16 for IPv4 if not specified.
+	// Defaults to /56 for IPv6 if not specified.
 	NetmaskLength int64 `json:"netmaskLength,omitempty"`
 }
 

config/crd/bases/controlplane.cluster.x-k8s.io_awsmanagedcontrolplanes.yaml

@@ -780,6 +780,7 @@ spec:
                               The netmask length of the IPv4 CIDR you want to allocate to VPC from
                               an Amazon VPC IP Address Manager (IPAM) pool.
                               Defaults to /16 for IPv4 if not specified.
+                              Defaults to /56 for IPv6 if not specified.
                             format: int64
                             type: integer
                         type: object
@@ -815,6 +816,7 @@ spec:
                                   The netmask length of the IPv4 CIDR you want to allocate to VPC from
                                   an Amazon VPC IP Address Manager (IPAM) pool.
                                   Defaults to /16 for IPv4 if not specified.
+                                  Defaults to /56 for IPv6 if not specified.
                                 format: int64
                                 type: integer
                             type: object
@@ -3040,6 +3042,7 @@ spec:
                               The netmask length of the IPv4 CIDR you want to allocate to VPC from
                               an Amazon VPC IP Address Manager (IPAM) pool.
                               Defaults to /16 for IPv4 if not specified.
+                              Defaults to /56 for IPv6 if not specified.
                             format: int64
                             type: integer
                         type: object
@@ -3075,6 +3078,7 @@ spec:
                                   The netmask length of the IPv4 CIDR you want to allocate to VPC from
                                   an Amazon VPC IP Address Manager (IPAM) pool.
                                   Defaults to /16 for IPv4 if not specified.
+                                  Defaults to /56 for IPv6 if not specified.
                                 format: int64
                                 type: integer
                             type: object

config/crd/bases/controlplane.cluster.x-k8s.io_awsmanagedcontrolplanetemplates.yaml

@@ -803,6 +803,7 @@ spec:
                                       The netmask length of the IPv4 CIDR you want to allocate to VPC from
                                       an Amazon VPC IP Address Manager (IPAM) pool.
                                       Defaults to /16 for IPv4 if not specified.
+                                      Defaults to /56 for IPv6 if not specified.
                                     format: int64
                                     type: integer
                                 type: object
@@ -839,6 +840,7 @@ spec:
                                           The netmask length of the IPv4 CIDR you want to allocate to VPC from
                                           an Amazon VPC IP Address Manager (IPAM) pool.
                                           Defaults to /16 for IPv4 if not specified.
+                                          Defaults to /56 for IPv6 if not specified.
                                         format: int64
                                         type: integer
                                     type: object

config/crd/bases/infrastructure.cluster.x-k8s.io_awsclusters.yaml

@@ -1750,6 +1750,7 @@ spec:
                               The netmask length of the IPv4 CIDR you want to allocate to VPC from
                               an Amazon VPC IP Address Manager (IPAM) pool.
                               Defaults to /16 for IPv4 if not specified.
+                              Defaults to /56 for IPv6 if not specified.
                             format: int64
                             type: integer
                         type: object
@@ -1785,6 +1786,7 @@ spec:
                                   The netmask length of the IPv4 CIDR you want to allocate to VPC from
                                   an Amazon VPC IP Address Manager (IPAM) pool.
                                   Defaults to /16 for IPv4 if not specified.
+                                  Defaults to /56 for IPv6 if not specified.
                                 format: int64
                                 type: integer
                             type: object

config/crd/bases/infrastructure.cluster.x-k8s.io_awsclustertemplates.yaml

@@ -1336,6 +1336,7 @@ spec:
                                       The netmask length of the IPv4 CIDR you want to allocate to VPC from
                                       an Amazon VPC IP Address Manager (IPAM) pool.
                                       Defaults to /16 for IPv4 if not specified.
+                                      Defaults to /56 for IPv6 if not specified.
                                     format: int64
                                     type: integer
                                 type: object
@@ -1372,6 +1373,7 @@ spec:
                                           The netmask length of the IPv4 CIDR you want to allocate to VPC from
                                           an Amazon VPC IP Address Manager (IPAM) pool.
                                           Defaults to /16 for IPv4 if not specified.
+                                          Defaults to /56 for IPv6 if not specified.
                                         format: int64
                                         type: integer
                                     type: object