Revert "Build cctest while building V8"

This reverts commit 7787ed20.

Reason for revert: Seems to break the archive bot (https://ci.chromium.org/ui/p/chromium/builders/ci/linux-archive-dbg/b8811978830853167601/overview)

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: I1d22362080962b424c21232f63e8896a2cbe2bb4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3695357
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81025}

test/cctest/BUILD.gn

@@ -16,13 +16,7 @@ v8_executable("cctest") {
 
   sources = [ "cctest.cc" ]
 
-  deps = [
-    ":cctest_sources",
-    "../..:v8_for_testing",
-    "../..:v8_libbase",
-    "../..:v8_libplatform",
-    "../../tools/debug_helper:v8_debug_helper",
-  ]
+  deps = [ ":cctest_sources" ]
 
   data_deps = [ "../../tools:v8_testrunner" ]
 
@@ -346,6 +340,10 @@ 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",
     "//build/win:default_exe_manifest",
   ]