Default-empty vectors of enums (#6505)

* disable clippy

* Vector of enum default

* swift and tests

* git clang format

* Rewrite enum parser checks

* Remove Voids from more_defaults

* vector enum swift

* remove vector accessor from swift

* clang format

Co-authored-by: Casper Neo <cneo@google.com>

tests/rust_usage_test/tests/more_defaults_test.rs

@@ -12,6 +12,8 @@ fn object_defaults() {
             floats: Vec::new(),
             empty_string: "".to_string(),
             some_string: "some".to_string(),
+            abcs: Vec::new(),
+            bools: Vec::new(),
         },
     )
 }
@@ -21,6 +23,8 @@ fn nonpresent_values() {
     let m = flatbuffers::root::<MoreDefaults>(&[0; 4]).unwrap();
     assert_eq!(m.ints().len(), 0);
     assert_eq!(m.floats().len(), 0);
+    assert_eq!(m.abcs().len(), 0);
+    assert_eq!(m.bools().len(), 0);
     assert_eq!(m.empty_string(), "");
     assert_eq!(m.some_string(), "some");
 }