linter: Fix false positive in cascade_invocations wrt const instantiations

Fixes https://github.com/dart-lang/sdk/issues/61150

Change-Id: Ia3813d31e5e486c3cd8367179ba8adcc72102b31
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/496403
Commit-Queue: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Keerti Parthasarathy <keertip@google.com>

pkg/linter/lib/src/rules/cascade_invocations.dart

@@ -167,7 +167,7 @@ class _CascadableExpression {
     return _CascadableExpression._internal(
       element,
       [],
-      canReceive: true,
+      canReceive: !node.variables.isConst,
       isCritical: true,
     );
   }

pkg/linter/test/rules/cascade_invocations_test.dart

@@ -62,6 +62,19 @@ class C {
     );
   }
 
+  test_constInstantiation() async {
+    await assertNoDiagnostics(r'''
+class A {
+  const A();
+}
+
+void f() {
+  const a = A();
+  a.toString();
+}
+''');
+  }
+
   test_methodCallDependsOnTarget() async {
     await assertNoDiagnostics(r'''
 class C {