Update bifrost.memory's understanding of memory spaces

[jaycedowell]

This PR updates the "memset" and "memcpy" functions in bifrost.memory to work with ndarrays that live in non-system accessible spaces.

This PR removes the deprecated memcpy and memset functions from bifrost.memory.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.19%. Comparing base (898e4a8) to head (98ccc58).
Report is 13 commits behind head on master.

❗ Current head 98ccc58 differs from pull request most recent head f9ae42b. Consider uploading reports for the commit f9ae42b to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #223      +/-   ##
==========================================
- Coverage   68.19%   68.19%   -0.01%     
==========================================
  Files          65       65              
  Lines        5515     5486      -29     
==========================================
- Hits         3761     3741      -20     
+ Misses       1754     1745       -9     

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[jaycedowell]

These test failures might be related to #220.

[jaycedowell]

It looks like these failures (and some of those part of the testing for #166) are related to missing file(s) needed by the extended testbench tests. Maybe we should drop those tests?

[jaycedowell]

I did one more check through code to see if I could find any lingering calls to bifrost.memory.memcpy* or bifrost.memory.memset*. Looks clean. I think this one is ready to go.