Fix WATCHLISTS being reverted in rolls

Don't overwrite WATCHLISTS each time with a checkout from the latest
release branch as that means it will never pick up changes from
master.

No-Try: true
Bug: chromium:832032
Change-Id: I3a9231369caa9a6591acb9b7f0c76dc031ab9178
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1926029
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65063}

tools/release/create_release.py

@@ -169,7 +169,6 @@ class MakeBranch(Step):
     self.Git("new-branch work-branch --upstream origin/%s" % self["version"])
     self.GitCheckoutFile(CHANGELOG_FILE, self["latest_version"])
     self.GitCheckoutFile(VERSION_FILE, self["latest_version"])
-    self.GitCheckoutFile(WATCHLISTS_FILE, self["latest_version"])
 
 
 class AddChangeLog(Step):

tools/release/test_scripts.py

@@ -913,7 +913,7 @@ TBR=reviewer@chromium.org"""
 
     expectations = [
       Cmd("git fetch origin +refs/heads/*:refs/heads/*", ""),
-      Cmd("git checkout -f origin/master", ""),
+      Cmd("git checkout -f origin/master", "", cb=self.WriteFakeWatchlistsFile),
       Cmd("git branch", ""),
       Cmd("git fetch origin +refs/tags/*:refs/tags/*", ""),
       Cmd("git tag", self.TAGS),
@@ -933,8 +933,6 @@ TBR=reviewer@chromium.org"""
       Cmd("git checkout -f 3.22.4 -- ChangeLog", "", cb=ResetChangeLog),
       Cmd("git checkout -f 3.22.4 -- include/v8-version.h", "",
           cb=self.WriteFakeVersionFile),
-      Cmd("git checkout -f 3.22.4 -- WATCHLISTS", "",
-          cb=self.WriteFakeWatchlistsFile),
       Cmd("git commit -aF \"%s\"" % TEST_CONFIG["COMMITMSG_FILE"], "",
           cb=CheckVersionCommit),
       Cmd("git cl upload --send-mail "