[Rust] Make ArrayData --> GenericListArray fallable instead of `panic!`

[asfimport]

1. Background:
   Left over cleanups suggested by from @sunchao on ARROW-11504: [Rust] Added checks to List DataType. #9425

   Broken out from ARROW-11504: [Rust] Added checks to List DataType (WIP IMPROVEMENTS) #9508

2. Rationale:

   Rationale: don't use panic! directly (though the caller of this function still calls unwrap() so I am not sure how much of an improvement this change really is. However it sets us up for a more safe future eventually

Reporter: Andrew Lamb / @alamb
Assignee: Andrew Lamb / @alamb

PRs and other links:

• GitHub Pull Request #9691

_{Note: This issue was originally created as ARROW-11952. Please see the migration documentation for further details.}

[asfimport]

Andrew Lamb / @alamb:
Issue resolved by pull request 9691
#9691