[M114-LTS][codegen] Install BytecodeArray last in SharedFunctionInfo

M114 merge issues:
  codegen/compiler.cc:
    set_age() isn't called in 114 - removed it from the change.

Maglev assumes that when a SharedFunctionInfo has a BytecodeArray,
then it should also have FeedbackMetadata. However, this may not
hold with concurrent compilation when the SharedFunctionInfo is
re-compiled after being flushed. Here the BytecodeArray was installed
on the SFI before the FeedbackMetadata and a concurrent thread could
observe the BytecodeArray but not the FeedbackMetadata.

Drive-by: Reset the age field before setting the BytecodeArray as
well. This ensures that the concurrent marker will not observe the
old age for the new BytecodeArray.

(cherry picked from commit 46cb67e)

Bug: chromium:1507412
No-Try: true
No-Presubmit: true
No-Tree-Checks: true
Change-Id: I8855ed7ecc50c4a47d2c89043d62ac053858bc75
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/5125960
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#91568}
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/5189926
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Roger Felipe Zanoni da Silva <rzanoni@google.com>
Cr-Commit-Position: refs/branch-heads/11.4@{v8#79}
Cr-Branched-From: 8a8a1e7-refs/heads/11.4.183@{#1}
Cr-Branched-From: 5483d8e-refs/heads/main@{#87241}

src/codegen/compiler.cc

@@ -676,11 +676,11 @@ void InstallUnoptimizedCode(UnoptimizedCompilationInfo* compilation_info,
     }
 #endif  // V8_ENABLE_WEBASSEMBLY
 
-    shared_info->set_bytecode_array(*compilation_info->bytecode_array());
-
     Handle<FeedbackMetadata> feedback_metadata = FeedbackMetadata::New(
         isolate, compilation_info->feedback_vector_spec());
     shared_info->set_feedback_metadata(*feedback_metadata, kReleaseStore);
+
+    shared_info->set_bytecode_array(*compilation_info->bytecode_array());
   } else {
 #if V8_ENABLE_WEBASSEMBLY
     DCHECK(compilation_info->has_asm_wasm_data());