[R][CI] Use rcmdcheck feature to ignore inconsequential notes

[asfimport]

I noticed https://r-lib.github.io/rcmdcheck/reference/rcmdcheck.html#turning-off-package-checks in the rcmdcheck docs. If we set that Config in DESCRIPTION, we can change rcmdcheck to error on "note", and then we'll get earlier notice about e.g. undefined global variables.

Reporter: Neal Richardson / @nealrichardson

_{Note: This issue was originally created as ARROW-17284. Please see the migration documentation for further details.}

[github-actions]

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