filter gif from lint rules (#5995)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/5995

when running `lintrunner -a`, it shows
```
(executorch) chenlai@chenlai-mbp executorch % lintrunner -a
Warning: Could not find a lintrunner config at: '.lintrunner.private.toml'. Continuing without using configuration file.
  UFMT success!
  CLANGFORMAT success!
  FLAKE8 success!
  NEWLINE failure
  CMAKE success!
  ETCAPITAL success!

>>> Lint for examples/models/llama2/Android3_2_1B_bf16.gif:

  Error (NEWLINE) Decoding failure
    utf-8 decoding failed due to UnicodeDecodeError:
    'utf-8' codec can't decode byte 0xf7 in position 10: invalid start byte

>>> Lint for examples/models/llama2/Android3_2_3B_SpinQuant.gif:

  Error (NEWLINE) Decoding failure
    utf-8 decoding failed due to UnicodeDecodeError:
    'utf-8' codec can't decode byte 0xf7 in position 10: invalid start byte

>>> Lint for examples/models/llama2/llama_via_xnnpack.gif:

  Error (NEWLINE) Decoding failure
    utf-8 decoding failed due to UnicodeDecodeError:
    'utf-8' codec can't decode byte 0xf7 in position 10: invalid start byte

>>> Lint for examples/models/llava/llava_via_xnnpack.gif:

  Error (NEWLINE) Decoding failure
    utf-8 decoding failed due to UnicodeDecodeError:
    'utf-8' codec can't decode byte 0xd0 in position 6: invalid continuation
    byte
Successfully applied all patches.
```
Thanks kirklandsign for identifying the root cause!

Reviewed By: kirklandsign

Differential Revision: D64059251

fbshipit-source-id: 6960ea7eb8108c622cf33870258bbe3da741e27e