typeexpr: More optional modifier tests

Ensuring that the constraint boolean carries through to the next level
of constraint calculation after an optional() modifier.

internal/typeexpr/get_type_test.go

@@ -257,6 +257,15 @@ func TestGetType(t *testing.T) {
 			}, []string{"age"}),
 			``,
 		},
+		{
+			`object({name=string,meta=optional(any)})`,
+			true,
+			cty.ObjectWithOptionalAttrs(map[string]cty.Type{
+				"name": cty.String,
+				"meta": cty.DynamicPseudoType,
+			}, []string{"meta"}),
+			``,
+		},
 		{
 			`object({name=string,age=optional(number)})`,
 			false,
@@ -266,6 +275,15 @@ func TestGetType(t *testing.T) {
 			}),
 			`Optional attribute modifier is only for type constraints, not for exact types.`,
 		},
+		{
+			`object({name=string,meta=optional(any)})`,
+			false,
+			cty.Object(map[string]cty.Type{
+				"name": cty.String,
+				"meta": cty.DynamicPseudoType,
+			}),
+			`Optional attribute modifier is only for type constraints, not for exact types.`,
+		},
 		{
 			`optional(string)`,
 			false,