fixing BoolOption schema to work as computed values

Author: eriktate

api/proto/teleport/legacy/types/types.proto

@@ -3090,7 +3090,7 @@ message RoleOptions {
     deprecated = true,
     (gogoproto.nullable) = true,
     (gogoproto.jsontag) = "port_forwarding,omitempty",
-    (gogoproto.customtype) = "NullBoolOption"
+    (gogoproto.customtype) = "BoolOption"
   ];
 
   // CertificateFormat defines the format of the user certificate to allow

api/types/role.go

@@ -1599,10 +1599,6 @@ type BoolOption struct {
 	Value bool
 }
 
-// NullBoolOption is an alias for BoolOption that allows values to remain undefined within the
-// terraform provider.
-type NullBoolOption = BoolOption
-
 // NewBoolOption returns Bool struct based on bool value
 func NewBoolOption(b bool) *BoolOption {
 	v := BoolOption{Value: b}