Filter out deprecation warnings from main entry point

[oyvindeide]

Issue
Resolves #7051

Approach
Short description of the approach

(Screenshot of new behavior in GUI if applicable)

• 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 tests pass locally (after every commit!)

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

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (66412cf) 83.73% compared to head (c24d0b2) 85.25%.
Report is 31 commits behind head on main.

Files	Patch %	Lines
src/ert/services/_storage_main.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7133      +/-   ##
==========================================
+ Coverage   83.73%   85.25%   +1.51%     
==========================================
  Files         367      379      +12     
  Lines       22138    22572     +434     
  Branches     1011     1032      +21     
==========================================
+ Hits        18538    19243     +705     
+ Misses       3286     3217      -69     
+ Partials      314      112     -202     

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