Refactor loading parameter matrices out of make_update_data

[ManInFez]

The loading and saving of paramter matrices are binded to python
and called directly from es_update

Issue
Resolves #my_issue

Approach
Short description of the approach

Pre review checklist

• Added appropriate release note label
• PR title captures the intent of the changes, and is fitting for release notes.
• Commit history is consistent and clean, in line with the contribution guidelines.

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[codecov-commenter]

Codecov Report

Merging #3429 (2eb7fa7) into main (65f1334) will increase coverage by 0.00%.
The diff coverage is 46.42%.

@@           Coverage Diff           @@
##             main    #3429   +/-   ##
=======================================
  Coverage   65.27%   65.27%           
=======================================
  Files         603      603           
  Lines       47728    47727    -1     
  Branches     4234     4220   -14     
=======================================
+ Hits        31155    31156    +1     
+ Misses      15217    15213    -4     
- Partials     1356     1358    +2     

Impacted Files	Coverage Δ
libres/lib/include/ert/analysis/update.hpp	0.00% <0.00%> (ø)
libres/lib/analysis/update.cpp	36.66% <40.00%> (-1.45%)	⬇️
res/enkf/es_update.py	96.51% <100.00%> (+0.12%)	⬆️
libres/lib/res_util/block_fs.cpp	67.69% <0.00%> (ø)

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[dafeda]

LGTM 👍