Add hdf5plugin dependency

[Anthchirp]

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

[Anthchirp]

Successfully ran regression tests on a newly bootstrapped environment

[codecov]

Codecov Report

Merging #1733 (b96dfde) into main (525bdab) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1733   +/-   ##
=======================================
  Coverage   67.22%   67.22%           
=======================================
  Files         616      616           
  Lines       69037    69037           
  Branches     9619     9619           
=======================================
+ Hits        46407    46409    +2     
+ Misses      20687    20685    -2     
  Partials     1943     1943           

[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.
• 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.

[Anthchirp]

There is a chance that conda gets its packages in a twist during the remove step and will run for a very long time before offering to upgrade many packages (and install new ones). You can also use the command
conda remove --force hdf5-external-filter-plugins hdf5-external-filter-plugins-bitshuffle hdf5-external-filter-plugins-bzip2 hdf5-external-filter-plugins-lz4 to remove the old plugins, which will not suffer from this issue.