Reland "[build] Include deopt-fuzzer isolates on fuzzer builders"

This is a reland of f259ec2d
Original change's description:
> [build] Include deopt-fuzzer isolates on fuzzer builders
> 
> TBR=sergiyb@chromium.org
> NOTRY=true
> NOTREECHECKS=true
> 
> Bug: v8:7012
> Change-Id: I1d0b0488cd9b7bf6a30edc0b010f32fb0914ed0b
> Reviewed-on: https://chromium-review.googlesource.com/743783
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49032}

TBR=sergiyb@chromium.org

Bug: v8:7012
Change-Id: Idbc7126ea0cbc37da1536ca3c0ed03c4ddb7c93d
Reviewed-on: https://chromium-review.googlesource.com/746781Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49051}

BUILD.gn

@@ -2759,6 +2759,8 @@ group("gn_all") {
 }
 
 group("v8_clusterfuzz") {
+  testonly = true
+
   deps = [
     ":d8",
   ]
@@ -2771,6 +2773,10 @@ group("v8_clusterfuzz") {
       ":d8(//build/toolchain/linux:clang_x86_v8_arm)",
     ]
   }
+
+  if (v8_test_isolation_mode != "noop") {
+    deps += [ "tools:run-deopt-fuzzer_run" ]
+  }
 }
 
 group("v8_archive") {