[vm] Always inline List.generate

Micro-benchmark creating 100,000 lists using

  List<int>.generate(1000, (int x) => x, growable: false);

in AOT mode on x64: 1006ms -> 311ms

Flutter gallery size in release mode on armv7
+6890 bytes (+0.0778%).

Flutter gallery size in release mode with size optimizations on armv7
+9303 bytes (+0.1222%).

Issue: #42283
Change-Id: I283c4dbaf90396dfbefdb59c2cd346def88e186a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151082
Reviewed-by: Régis Crelier <[email protected]>
Commit-Queue: Alexander Markov <[email protected]>

Author: alexmarkov

sdk_nnbd/lib/_internal/vm/lib/array_patch.dart

@@ -69,6 +69,7 @@ class List<E> {
   }
 
   @patch
+  @pragma("vm:prefer-inline")
   factory List.generate(int length, E generator(int index),
       {bool growable = true}) {
     final List<E> result =