[C++] CSV reader should validate options

[asfimport]

Currently the only validation of csv options is done by asserts. These options should always be validated by the reader on each reader creation.

Reporter: Nate Clark / @n3world
Assignee: Nate Clark / @n3world

PRs and other links:

• GitHub Pull Request #10505

_{Note: This issue was originally created as ARROW-12995. Please see the migration documentation for further details.}

[asfimport]

Nate Clark / @n3world:
One of the validations I tried to add was that ReadOptions::block_size needs to be at least 1KB which seemed like a reasonable minimum but there are some csv tests which set block size to really small. I can update those tests to work with a larger block size or I can change the minimum block size to something like 1, any preferences?

[asfimport]

Antoine Pitrou / @pitrou:
Issue resolved by pull request 10505
#10505