Add hdf5plugin dependency

[Anthchirp]

over the previously used (and abandoned) hdf5-external-filter-plugins

See also: dials/dials#1733

[codecov]

Codecov Report

Merging #373 (31eb6a7) into main (63a9625) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #373      +/-   ##
==========================================
- Coverage   48.59%   48.58%   -0.02%     
==========================================
  Files         235      235              
  Lines       19437    19429       -8     
  Branches     2738     2738              
==========================================
- Hits         9445     9439       -6     
+ Misses       9485     9483       -2     
  Partials      507      507              

[Anthchirp]

If you have an existing DIALS development installation then you should follow these steps when convenient:

• Update the dxtbx and dials repositories
• Run
  conda remove hdf5-external-filter-plugins
  and
  conda install -c conda-forge hdf5plugin
  to change the installed packages.
  Please see Add hdf5plugin dependency dials/dials#1733 (comment) if the remove step takes a very long time or produces unexpected results.
• This can then be followed by a
  make reconf
  in the build directory to make sure the build is up-to-date.

Future bootstrapped environments will have these changes included automatically.