Add test with exact types to fuzzer ignore list (#7548)

Author: tlively

scripts/test/fuzzing.py

@@ -115,6 +115,7 @@
     'exact-casts.wast',
     'exact-casts-trivial.wast',
     'optimize-instructions-exact.wast',
+    'optimize-instructions-all-casts.wast',
     'optimize-instructions-all-casts-exact.wast',
     'local-subtyping-exact.wast',
     'remove-unused-types-exact.wast',