Relying on tests/setup_script.sh and not using a special docker test image

[iartemov-ledger]

schedule-simulated full run: https://github.com/LedgerHQ/app-bitcoin-new/actions/runs/22486514817 🟢

Some interesting figures:

• "install test dependencies" step duration before: ~24.4s (24s, 21s, 20s, 26s, 31s)
• "install test dependencies" step duration with this PRs (includes bitcoin core and dependencies installation): 50s (50s, 55s, 55s, 49s, 41s) so ~25 seconds of overhead, but we do not use a docker image and with ~15 minutes of total test execution run, its' about 3% time increase.

To fix the test let's wait for bitcoin core 31.0 in a couple of months that would contain a full musig2 support.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.45%. Comparing base (722aa6a) to head (95ef54e).

Additional details and impacted files

@@                  Coverage Diff                  @@
##           bug_fixes_2026-02-18     #431   +/-   ##
=====================================================
  Coverage                 79.45%   79.45%           
=====================================================
  Files                        26       26           
  Lines                      3388     3388           
  Branches                    523      523           
=====================================================
  Hits                       2692     2692           
  Misses                      682      682           
  Partials                     14       14           

Flag	Coverage Δ
unittests	79.45% <ø> (ø)

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[ledger-wiz-cspm-secret-detection]

Wiz Scan Summary

Scanner	Findings
Sensitive Data	-
Secrets	-
IaC Misconfigurations	34  1
SAST Findings	-
Software Management Findings	-
Total	34  1

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