Reland "Build cctest while building V8"

This is a reland of commit 7787ed20

Updates since original: specified that cctest sources depend on
generated files from the inspector.

Original change's description:
> Build cctest while building V8
>
> I noticed in a recent build that C++ files from cctest didn't start
> compiling until after several slow non-parallel tasks such as running
> mksnapshot and linking v8_for_testing. I don't see any reason that
> cctest sources should wait for those tasks, so in this change I propose
> adjusting the build dependencies for more parallelism.
>
> Change-Id: I2472117c8555ac397fa1232954c8b699d6429d38
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3690170
> Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/main@{#80976}

Change-Id: I9f507c3c07bda1638b81de4b1ac82afda1168999
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3699405Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81112}

src/inspector/BUILD.gn

@@ -42,7 +42,6 @@ action("protocol_compatibility") {
 }
 
 inspector_protocol_generate("protocol_generated_sources") {
-  visibility = [ ":*" ]  # Only targets in this file can depend on this.
   deps = [ ":protocol_compatibility" ]
 
   inspector_protocol_dir = _inspector_protocol

test/cctest/BUILD.gn

@@ -16,7 +16,13 @@ v8_executable("cctest") {
 
   sources = [ "cctest.cc" ]
 
-  deps = [ ":cctest_sources" ]
+  deps = [
+    ":cctest_sources",
+    "../..:v8_for_testing",
+    "../..:v8_libbase",
+    "../..:v8_libplatform",
+    "../../tools/debug_helper:v8_debug_helper",
+  ]
 
   data_deps = [ "../../tools:v8_testrunner" ]
 
@@ -325,10 +331,7 @@ v8_source_set("cctest_sources") {
   public_deps = [
     ":cctest_headers",
     "..:common_test_headers",
-    "../..:v8_for_testing",
-    "../..:v8_libbase",
-    "../..:v8_libplatform",
-    "../../tools/debug_helper:v8_debug_helper",
+    "../../src/inspector:protocol_generated_sources",
     "//build/win:default_exe_manifest",
   ]