Enable .viewAsSupertype to work on Records (backport #3267) (#3269)

* Enable .viewAsSupertype to work on Records (#3267)

- Enable .viewAsSupertype to work on Records
- fix a nondeterminism error in DataView noticeable on error reporting

(cherry picked from commit bdb04ad7

)

* Waive binary compatibility changes

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Co-authored-by: Megan Wachs <megan@sifive.com>
Co-authored-by: Jack Koenig <koenig@sifive.com>