Replace stringvector_type with stl::vector

[oyvindeide]

Issue
Resolves #2515

[codecov-commenter]

Codecov Report

Merging #2527 (14b2c49) into main (94d7347) will decrease coverage by 0.10%.
The diff coverage is 30.37%.

@@            Coverage Diff             @@
##             main    #2527      +/-   ##
==========================================
- Coverage   64.82%   64.71%   -0.11%     
==========================================
  Files         648      651       +3     
  Lines       54188    54234      +46     
  Branches     4517     4597      +80     
==========================================
- Hits        35127    35098      -29     
- Misses      17655    17702      +47     
- Partials     1406     1434      +28     

Impacted Files	Coverage Δ
libres/lib/analysis/update.cpp	0.00% <0.00%> (ø)
libres/lib/include/ert/python.hpp	0.00% <ø> (ø)
libres/lib/python/enkf_fs_manager.cpp	0.00% <0.00%> (ø)
libres/lib/python/ensemble_config.cpp	0.00% <0.00%> (ø)
libres/lib/python/init.cpp	0.00% <0.00%> (ø)
libres/lib/python/py_conversion.cpp	0.00% <0.00%> (ø)
res/enkf/enkf_state.py	73.68% <0.00%> (ø)
libres/lib/enkf/enkf_state.cpp	67.09% <36.36%> (-2.81%)	⬇️
libres/lib/enkf/enkf_main_manage_fs.cpp	56.68% <46.66%> (-2.67%)	⬇️
libres/lib/enkf/ensemble_config.cpp	54.16% <50.00%> (-0.59%)	⬇️
... and 13 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 94d7347...14b2c49. Read the comment docs.

[oyvindeide]

CI failure is unrelated:
ImportError: cannot import name BeartypeDecorHintPepDeprecatedWarning

[dafeda]

A lot of changes, but looks solid 👍

[oyvindeide]

A lot of changes, but looks solid 👍

Yes 😬 I agree the diff is quite large, but I think this is the minimum I could get away with without doing conversions from ecl types to std::

[oyvindeide]

test this please