ARROW-7842 add tiny parquet with int and utf8 list columns

[mcassels]

A parquet with non-nested list columns is needed for datafusion testing for the Rust list-type column reader implementation, because nested lists are not yet supported: apache/arrow#6770

[Fokko]

LGTM

MacBook-Pro-van-Fokko:Downloads fokkodriesprong$ parquet-tools schema list_columns.parquet 
message schema {
  optional group int64_list (LIST) {
    repeated group list {
      optional int64 item;
    }
  }
  optional group utf8_list (LIST) {
    repeated group list {
      optional binary item (UTF8);
    }
  }
}

MacBook-Pro-van-Fokko:Downloads fokkodriesprong$ parquet-tools cat list_columns.parquet 
int64_list:
.list:
..item = 1
.list:
..item = 2
.list:
..item = 3
utf8_list:
.list:
..item = abc
.list:
..item = efg
.list:
..item = hij

int64_list:
.list:
.list:
..item = 1

int64_list:
.list:
..item = 4
utf8_list:
.list:
..item = efg
.list:
.list:
..item = hij
.list:
..item = xyz

[nevi-me]

We'll need this before we can merge apache/arrow#6770