bring scan_pe (disabled) up to date with signify library

[mattbing]

Describe the change
The ScanPe module is disabled by default, we don't use it in production. Regardless it was already broken with changes to the signify library that parses PE files. With the latest bump to signify 0.9.2 it broken even more. This brings it to parity, just in case.

Describe testing procedures
I ran it via my own local harness:

$ ./strelka_client.py --host 127.0.0.1 --port 57314 Autoruns.exe | tail -n +3 | jq -C '.scan.pe' | head -20
Connecting to 127.0.0.1:57314...
Scanning Autoruns.exe (1758240 bytes)...
{
  "address_of_entry_point": 517725,
  "base_of_code": 4096,
  "base_of_data": 733184,
  "checksum": 1802854,
  "compile_time": "2024-02-01T10:45:10",
  "debug": {
    "age": 1,
    "guid": "ad14ff51-3fda-204a-8efac840b8b804b1",
    "pdb": "D:\\a\\1\\s\\Win32\\Release\\Autoruns.pdb",
    "type": "rsds"
  },
  "dll_characteristics": [
    "DYNAMIC_BASE",
    "NX_COMPAT",
    "TERMINAL_SERVER_AWARE"
  ],
  "elapsed": 0.25336,
  "file_alignment": 512,
  "file_info": {

Sample output
Nope.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of and tested my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings