[test] Blacklist more flags on endurance fuzzer

TBR=ulan@chromium.org
NOTRY=true

Bug: v8:6972
Change-Id: I78d15094499d134b97903d97249c667c0c244291
Reviewed-on: https://chromium-review.googlesource.com/897365Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51040}

test/mjsunit/testcfg.py

@@ -43,7 +43,9 @@ NO_HARNESS_PATTERN = re.compile(r"^// NO HARNESS$", flags=re.MULTILINE)
 
 # Flags known to misbehave when combining arbitrary mjsunit tests.
 COMBINE_TESTS_FLAGS_BLACKLIST = [
+  '--check-handle-count',
   '--mock-arraybuffer-allocator',
+  '--print-ast',
   '--wasm-lazy-compilation',
 ]