[build] Stop using split_static_library

The targets were removed in:
https://crrev.com/c/1865420

Bug: v8:9911
Change-Id: I3fef2af6f8c1975a4b540965c72eaf7f69f4c78e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1883893
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64606}

gni/v8.gni

@@ -138,7 +138,7 @@ if (!build_with_chromium && is_clang) {
 template("v8_source_set") {
   if (defined(invoker.split_count) && invoker.split_count > 1 &&
       defined(v8_static_library) && v8_static_library && is_win) {
-    link_target_type = "jumbo_split_static_library"
+    link_target_type = "split_static_library"
   } else if (defined(v8_static_library) && v8_static_library) {
     link_target_type = "jumbo_static_library"
   } else {