[Rust] Add `try_from(Vec<Option<(&str, ArrayRef)>>)` to StructArray

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Reporter: Jorge Leitão / @jorgecarleitao
Assignee: Jorge Leitão / @jorgecarleitao

PRs and other links:

• GitHub Pull Request #8118

_{Note: This issue was originally created as ARROW-9922. Please see the migration documentation for further details.}

[asfimport]

Andy Grove / @andygrove:
Issue resolved by pull request 8118
#8118