Fix avoid-late if initialized

lib/lints/avoid_late_keyword/avoid_late_keyword_rule.dart

@@ -32,6 +32,10 @@ class AvoidLateKeywordRule extends SolidLintRule {
   ) {
     context.registry.addVariableDeclaration((node) {
       if (node.declaredElement?.isLate ?? false) {
+        if (node.initializer != null) {
+          // Ignore late variables that are initialized right away
+          return;
+        }
         reporter.reportErrorForNode(code, node);
       }
     });

lint_test/avoid_late_keyword_test.dart

@@ -5,17 +5,19 @@
 ///
 /// `avoid_late_keyword`
 class AvoidLateKeyword {
-  /// expect_lint: avoid_late_keyword
   late final field1 = 'string';
 
   /// expect_lint: avoid_late_keyword
   late String field2;
 
+
+
   void test() {
-    /// expect_lint: avoid_late_keyword
     late final field3 = 'string';
 
     /// expect_lint: avoid_late_keyword
     late String field4;
+
+    late String field5 = 'string';
   }
 }