Update kernels for non-fatal (part 2) (#2104)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/2104

Update kernels and tests starting with 'b'.

Note to reviewers: Because the changeset for non-fatal touches so many files, I've split into a number of diffs. The tests will not all pass until the final diff, given that non-fatal tests are switched on in the first diff but tests are not updated until the respective later diff. See revision 6.6 of D53251417 to observe the full change-set passing CI.

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Reviewed By: kirklandsign

Differential Revision: D54181923

fbshipit-source-id: a038a04cebe9a7f2f020b30bd3dc49438da618a5