[r/ci] Controlled downgrade for TileDB-R 0.25

[johnkerl]

Issue and/or context: Applies the same pattern on the release-1.9 branch as #1972 did for the release-1.5 branch, #1996 did for the release-1.6 branch, #2157 did for the release-1.7 branch, and #2295 did for the release-1.8 branch.

Standard procedure:
https://github.com/single-cell-data/TileDB-SOMA/wiki/Branches-and-releases#incrementing-core-versions

Changes: As on #1972, #1996, #2157, and #2295. This is necessary since TileDB-R 0.26.0 will soon exist, and the R language's DESCRIPTION file does not syntactically support tiledb < 0.26 or tiledb <= 0.26. Therefore (see also this comment #1996 (comment)) we do a controlled downgrade to TileDB-R 0.25 on this PR, for the release-1.9 branch.

Notes for Reviewer: Every stanza in this PR has been proved necessary via the dialog on #1972, #1996, #2157, and #2295. See in particular #1996 (review).

[codecov]

Codecov Report

Merging #2373 (afdc498) into release-1.9 (2a143aa) will decrease coverage by 14.97%.
Report is 1 commits behind head on release-1.9.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.9    #2373       +/-   ##
================================================
- Coverage        81.10%   66.14%   -14.97%     
================================================
  Files               89      143       +54     
  Lines             8337    12807     +4470     
  Branches             0      511      +511     
================================================
+ Hits              6762     8471     +1709     
- Misses            1575     4235     +2660     
- Partials             0      101      +101     

Flag	Coverage Δ
libtiledbsoma	38.71% <ø> (?)
python	90.59% <ø> (ø)
r	71.90% <ø> (-0.91%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
python_api	90.59% <ø> (ø)
libtiledbsoma	19.70% <ø> (∅)

[eddelbuettel]

and the R DESCRIPTION file does not syntactically support tiledb < 0.26 or tiledb <= 0.26.

For completeness, I learned this week (following discussions with a friend) that it does.

And indeed I built the SOMA package here with

    tiledb (>= 0.25.0), tiledb (<= 0.26.0),

(where the second value should probably have been 0.25.98 or similar given the <=). Earlier R told me when I tried an = (against the then-version on my box)

 Malformed Depends or Suggests or Imports or Enhances field.
Entries with infeasible comparison operator:
  tiledb (= 0.25.0.6)
Only operators '<=' and '>=' are possible.

I have not had time to work through ramifications or do any tests. I have an inkling that this may not work unless we do what we hitherto avoided namely providing repos with the aimed-for version (which has been suggested a few times).

(PS Of course, I cannot find any reference to it in Writing R Extensions. Sigh. Maybe R Internals or R Admin. The code example was real. I let me have a pair less-than-or-equal and greater-than-or-equal. Things you learn after 25 years.)

[johnkerl]

More discussion on #2374 about possible new experiments, beyond the known-good pattern on this PR which is proven to keep our CI green for four releases now.

[johnkerl]

[sc-44675]

[shortcut-integration]

This pull request has been linked to Shortcut Story #44675: tiledbsoma 1.9.4.