Revert "Change sszutil DeepEqual to ignore unexported fields" (#8391)

* Revert "Change sszutil DeepEqual to ignore unexported (#8336)"

This reverts commit 8d986bd.

* Add back tests, make tests have equal and non equal check

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>

shared/sszutil/deep_equal.go

@@ -109,13 +109,7 @@ func deepValueEqual(v1, v2 reflect.Value, visited map[visit]bool, depth int) boo
 		return deepValueEqual(v1.Elem(), v2.Elem(), visited, depth+1)
 	case reflect.Struct:
 		for i, n := 0, v1.NumField(); i < n; i++ {
-			v1Field := v1.Field(i)
-			v2Field := v2.Field(i)
-			if !v1Field.CanInterface() || !v2Field.CanInterface() {
-				// Continue for unexported fields, since they cannot be read anyways.
-				continue
-			}
-			if !deepValueEqual(v1Field, v2Field, visited, depth+1) {
+			if !deepValueEqual(v1.Field(i), v2.Field(i), visited, depth+1) {
 				return false
 			}
 		}

shared/sszutil/deep_equal_test.go

@@ -51,7 +51,7 @@ func TestDeepEqualStructs_Unexported(t *testing.T) {
 		ignoreMe string
 	}
 	store1 := Store{uint64(1234), nil, "hi there"}
-	store2 := Store{uint64(1234), []byte{}, "oh hey"}
+	store2 := Store{uint64(1234), []byte{}, "hi there"}
 	store3 := Store{uint64(4321), []byte{}, "wow"}
 	assert.Equal(t, true, sszutil.DeepEqual(store1, store2))
 	assert.Equal(t, false, sszutil.DeepEqual(store1, store3))