Don't optimize away `eval` when its lexical context is different

* lisp/emacs-lisp/bytecomp.el (byte-compile-file-form-eval):
Obey lexical-binding.
1 job for master in 120 minutes and 2 seconds (queued for 5 seconds)
Status Job ID Name Coverage
failed #8915


Name Stage Failure
test-all Test The script exceeded the maximum execution time set for the job
make -C test check-expensive
make[1]: Entering directory '/builds/emacs/emacs/test'
rm -f ./*.tmp
make[2]: Entering directory '/builds/emacs/emacs/test'
make[3]: Entering directory '/builds/emacs/emacs/test'
ELC lisp/net/tramp-tests.elc
GEN lisp/net/tramp-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-d0b76032 ...
ERROR: Job failed: execution took longer than 2h0m0s seconds