[Rust] Implement changes to ensure flatbuffer alignment

[asfimport]

See ARROW-6313, changes were made to all IPC implementations except for Rust

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

Related issues:

• [Format] Tracking for ensuring flatbuffer serialized values are aligned in stream/files. (is part of)

PRs and other links:

• GitHub Pull Request #8174

_{Note: This issue was originally created as ARROW-9848. Please see the migration documentation for further details.}

[asfimport]

Andy Grove / @andygrove:
Issue resolved by pull request 8174
#8174