Disable test_poppler under ubsan and lsan (#17188)

This fixes the current waterfall failures.  I'm not sure how time its
worth spending investigating this kind of thing.

Author: sbc100

tests/test_core.py

@@ -6777,6 +6777,8 @@ def test_bullet(self, use_cmake):
                  includes=[test_file('third_party/bullet/src')])
 
   @no_asan('issues with freetype itself')
+  @no_ubsan('local count too large')
+  @no_lsan('output differs')
   @needs_make('depends on freetype')
   @no_wasm64('MEMORY64 does not yet support SJLJ')
   @is_slow_test