[Rust] RecordBatch::new() should return result instead of panicking

[asfimport]

RecordBatch::new() has some good validation checks, but calls assert_eq instead of returning a Result

Reporter: Andy Grove / @andygrove
Assignee: Neville Dipale / @nevi-me

PRs and other links:

• GitHub Pull Request #3800

_{Note: This issue was originally created as ARROW-4749. Please see the migration documentation for further details.}

[asfimport]

Chao Sun / @sunchao:
Issue resolved by pull request 3800
#3800