Fix precision loss issue in calculation of standard deviation.

[eivindjahren]

Issue
Resolves #9301

Approach

The problem was due to catastrophic precision loss in the standard deviation calculation.
This PR changes the update function so that standard deviation is calculated in 64 bit float
precision. It still remains to validate that this does not use too much memory.

• In src/ert/analysis/_es_update.py: Changed the standard deviation calculation to 64-bit precision.
• In tests/ert/ui_tests/cli/test_update.py: Added a property test that was used to find the bug, and several others: Warning of ill-conditioned matrix only showed in terminal #9590, uninformative error message when writing updated zero values of logarithmic data #9585, Uninformative error message in update: "Matrix is singular." #9581, Invalid values for DERRF distribution leads to "float division by zero" in update #9523, & Parameters for triangular distribution is not validated #9520 .
• In tests/ert/unit_tests/analysis/test_es_update.py: Added a new test to handle precision loss in standard deviation calculation.

• PR title captures the intent of the changes, and is fitting for release notes.
• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.
• Make sure unit tests pass locally after every commit (git rebase -i main --exec 'pytest tests/ert/unit_tests -n logical -m "not integration_test"')

When applicable

• When there are user facing changes: Updated documentation
• New behavior or changes to existing untested code: Ensured that unit tests are added (See Ground Rules).
• Large PR: Prepare changes in small commits for more convenient review
• Bug fix: Add regression test for the bug
• Bug fix: Create Backport PR to latest release

[codspeed-hq]

CodSpeed Performance Report

Merging #9625 will not alter performance

_{Comparing eivindjahren:fix_update_issue (a87a4d4) with main (855c517)}

Summary

✅ 24 untouched benchmarks