internal/boundary: add GetResourceType to Resource

The resource type method is used to automatically
create refresh tokens from a resource when that
resource is the last item returned in a page.

This also renames the iam domain ResourceType method
to GetResourceType to align with the new method.

internal/auth/password/authmethod.go

@@ -9,6 +9,7 @@ import (
 	"github.com/hashicorp/boundary/internal/auth/password/store"
 	"github.com/hashicorp/boundary/internal/errors"
 	"github.com/hashicorp/boundary/internal/oplog"
+	"github.com/hashicorp/boundary/internal/types/resource"
 	"google.golang.org/protobuf/proto"
 )
 
@@ -69,6 +70,11 @@ func (a *AuthMethod) SetTableName(n string) {
 	a.tableName = n
 }
 
+// GetResourceType returns the resource type of the AuthMethod
+func (a *AuthMethod) GetResourceType() resource.Type {
+	return resource.AuthMethod
+}
+
 func (a *AuthMethod) oplog(op oplog.OpType) oplog.Metadata {
 	metadata := oplog.Metadata{
 		"resource-public-id": []string{a.GetPublicId()},