Dplyr and vctrs compatibility

[mikemahoney218]

We should copy these tests into spatialsample:

https://github.com/tidymodels/rsample/blob/main/tests/testthat/test-compat-dplyr.R

https://github.com/tidymodels/rsample/blob/main/tests/testthat/test-compat-vctrs.R

And then update the compat-dply and compat-vctrs files to support every rset and rsplit class in the package.

[mikemahoney218]

We may not need the dplyr one because we superclass rset, which handles it

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