[test] Add is_cfi variable for test status files

Bug: v8:10640
Change-Id: Ifa485c285f345ca1ffba949feb8fc70b160a018c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2264627Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68523}

tools/testrunner/base_runner.py

@@ -676,6 +676,7 @@ class BaseTestRunner(object):
       "arch": self.build_config.arch,
       "asan": self.build_config.asan,
       "byteorder": sys.byteorder,
+      "cfi_vptr": self.build_config.cfi_vptr,
       "dcheck_always_on": self.build_config.dcheck_always_on,
       "deopt_fuzzer": False,
       "endurance_fuzzer": False,