test(archive/ar): test file with non-utf8 file name

The test archive is created with the below scripts.

A valid archive with utf8 file name (and content) is created with

sh:
  echo "árvíztűrő tükörfúrógép" > "árvíztűrő tükörfúrógép"
  ar q utf8.ar "árvíztűrő tükörfúrógép"

Then the resulting archive is mutated in the file name, so that it is no
longer a valid utf8 encoded:

python:
  c = Path("utf8.ar").read_bytes()
  Path("a1x01.ar").write_bytes(c.replace(bytes([0xa1]), bytes([0x01]), 1))

Author: e3krisztian

tests/integration/archive/ar/__input__/a1x01.ar

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7981c6fabc0cb521c443d3b2e8e54713cae8bbccf8208b1950a078367567c3bb
+size 194

tests/integration/archive/ar/__output__/a1x01.ar_extract/�
rvíztűrő tükörfúrógép

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8f78453bcd88cb902c86638bafa48432fcbc262ede1eeacc2b623e14b1ea0a92
+size 31