fix: Correct FileObject import

[baderj]

Commit 9853f23 erroneously moved the import of FileObject in pymisp/tools/create_misp_object.py to the TYPE_CHECKING conditional. This was later changed by 8fb34a2, however, the commit moved the import inside the try-except-block related to lief. As a consequence FileObject is not imported if lief is not available, but it is needed regardless, resulting in confusing exceptions unrelated to lief:

Traceback (most recent call last):
  File "/home/user/test.py", line 16, in <module>
    event.run_expansions()
  File "/home/user/.venv/lib/python3.10/site-packages/pymisp/mispevent.py", line 2029, in run_expansions
    file_object, bin_type_object, bin_section_objects = make_binary_objects(pseudofile=attribute.malware_binary, filename=attribute.malware_filename)
  File "/home/user/.venv/lib/python3.10/site-packages/pymisp/tools/create_misp_object.py", line 44, in make_binary_objects
    misp_file = FileObject(filepath=filepath, pseudofile=pseudofile, filename=filename,
NameError: name 'FileObject' is not defined

This pull request moves the import of FileObject outside the try-except block where it was before 9853f23.

[Rafiot]

woops, right, thanks!