core-initrd: maintain an explict list of ignored dlopen features

[valentindavid]

We should not ignore libraries including suggested one. We should list what we ignore.

[github-actions]

Thu Sep 24 14:21:55 UTC 2026
The following results are from: https://github.com/canonical/snapd/actions/runs/36009516461

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.40%. Comparing base (d07ce96) to head (2c0d149).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #17707      +/-   ##
==========================================
+ Coverage   78.38%   78.40%   +0.02%     
==========================================
  Files        1422     1417       -5     
  Lines      200797   200693     -104     
  Branches     2503     2503              
==========================================
- Hits       157388   157349      -39     
+ Misses      33977    33920      -57     
+ Partials     9432     9424       -8     

Flag	Coverage Δ
unittests	78.40% <ø> (+0.02%)	⬆️

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