[Rust] [Parquet] Write fixed size binary arrays

[asfimport]

We already write FSB when writing binary arrays, so this extends the support by removing unimplemented code paths

Reporter: Neville Dipale / @nevi-me
Assignee: Neville Dipale / @nevi-me

PRs and other links:

• GitHub Pull Request #9771

_{Note: This issue was originally created as ARROW-12043. Please see the migration documentation for further details.}

[asfimport]

Neville Dipale / @nevi-me:
Issue resolved by pull request 9771
#9771