[llvm] [DFAJumpThreading] Enable the pass by default (PR #83033)

[Nikita Popov via llvm-commits]

nikic wrote:

More results from llvm-opt-benchmark:
```
Top 5 regressions:
  openssl/openssl-bin-smime.ll 475446451 -> 1171329774 +146.36%
  php/php_http_parser.ll 757649325 -> 1845439220 +143.57%
  hyperscan/Parser.cpp.ll 5461814098 -> 7624209225 +39.59%
  ruby/gb18030.ll 119054238 -> 161772306 +35.88%
  jq/gb18030.ll 123053668 -> 166193537 +35.06%
```

https://github.com/llvm/llvm-project/pull/83033