[Backport release-1.7] Backport #2158 and #2166 to release-1.7

[johnkerl]

Backports #2158 and #2166 to the release-1.7 branch. As with #2165, I had hoped for a clean backport, but I found on #2158 that that sadly did not occur. Instead, I am re-iterating the approach of #2165, which is a bulk-sync of main to release-1.7 except for these release-specific files:

.github/workflows/r-ci.yml
.github/workflows/r-python-interop-testing.yml
apis/r/DESCRIPTION
apis/r/NEWS.md
apis/r/tools/get_tarball.R
libtiledbsoma/cmake/Modules/FindTileDB_EP.cmake

[codecov]

Codecov Report

Merging #2170 (e15ac1d) into release-1.7 (0641874) will decrease coverage by 6.30%.
The diff coverage is 71.28%.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-1.7    #2170      +/-   ##
===============================================
- Coverage        78.38%   72.08%   -6.30%     
===============================================
  Files              135      102      -33     
  Lines            10699     6885    -3814     
  Branches           211      215       +4     
===============================================
- Hits              8386     4963    -3423     
+ Misses            2211     1823     -388     
+ Partials           102       99       -3     

Flag	Coverage Δ
libtiledbsoma	67.63% <71.28%> (+0.86%)	⬆️
python	?
r	74.68% <ø> (ø)

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Components	Coverage Δ
python_api	∅ <ø> (∅)
libtiledbsoma	48.67% <51.51%> (+0.62%)	⬆️