Add parquet-concat

[tustvold]

Which issue does this PR close?

Closes #.

Rationale for this change

Adds a CLI tool for efficiently concatenating parquet files, this definitely could be made more sophisticated, but serves as a demo of how to use the new API added in #4269 whilst also providing some utility to users

What changes are included in this PR?

Are there any user-facing changes?

[alamb]

I recommend adding a doc comment from append_column added in #4269 to this binary as an example of how to use it

I tested this out with some local parquet data:

parquet-concat combined.parquet 1.parquet 2.parquet
(arrow_dev) alamb@MacBook-Pro-8:~/Downloads$ du -s -h 1.parquet 2.parquet combined.parquet
 69M	1.parquet
 40K	2.parquet
 69M	combined.parquet

+-----------------+
| COUNT(UInt8(1)) |
+-----------------+
| 9332578         |
+-----------------+
1 row in set. Query took 0.007 seconds.
❯ select count(*) from '2.parquet';
+-----------------+
| COUNT(UInt8(1)) |
+-----------------+
| 637             |
+-----------------+
❯ select count(*) from 'combined.parquet';
+-----------------+
| COUNT(UInt8(1)) |
+-----------------+
| 9333215         |
+-----------------+
❯ select avg(value) from (select value from '1.parquet' UNION ALL select value from '2.parquet');
+----------------------+
| AVG(1.parquet.value) |
+----------------------+
| 82.11578603943015    |
+----------------------+
1 row in set. Query took 0.035 seconds.
❯ select avg(value) from 'combined.parquet';
+-----------------------------+
| AVG(combined.parquet.value) |
+-----------------------------+
| 82.11578603943015           |
+-----------------------------+
1 row in set. Query took 0.015 seconds.

Works great for me 🚀

[tustvold]

I recommend adding a doc comment from append_column added in #4269 to this binary as an example of how to use it

I'm not actually sure how to do this, I will link ArrowWriter following #3871 as I think that will be more discoverable