Use rapids-cmake 22.10 best practice for RAPIDS.cmake location

[robertmaynard]

Description

Removes possibility of another projects RAPIDS.cmake being used, and removes need to always download a version.

Checklist

• [x] I am familiar with the Contributing Guidelines.
• [x] New or existing tests cover these changes.
• [x] The documentation is up to date with these changes.

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (branch-22.10@6b20f2a). Click here to learn what that means. The diff coverage is n/a.

@@               Coverage Diff               @@
##             branch-22.10   #11493   +/-   ##
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  Coverage                ?   86.46%           
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  Files                   ?      144           
  Lines                   ?    22852           
  Branches                ?        0           
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  Hits                    ?    19760           
  Misses                  ?     3092           
  Partials                ?        0           

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[robertmaynard]

@gpucibot merge