Windows Event Log message strings support enhancements

[joachimmetz]

Continuation of Continuation of #4169

• Allow PE/COFF message table resource more specific language to fallback on less specific language e.g. "en-US" to fallback to "en"
  • is this something more common on older versions of Windows (XP and earlier) ?
• clean up: winevt_rc: raise if open fails instead of return false