func-tests: try to fix flaky bridge tests

[storopoli]

Description

Fix the functional bridge test that is flaky. Adding a 0.5s sleep between deposits tests might be enough.

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature/Enhancement (non-breaking change which adds functionality or enhances an existing one)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation update
• [ ] Refactor
• [x] New or updated tests

Checklist

• [ ] I have performed a self-review of my code.
• [ ] I have commented my code where necessary.
• [ ] I have updated the documentation if needed.
• [ ] My changes do not introduce new warnings.
• [ ] I have added tests that prove my changes are effective or that my feature works.
• [ ] New and existing tests pass with my changes.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 56.99%. Comparing base (e9e2ba7) to head (1177c0f). Report is 3 commits behind head on main.

@@            Coverage Diff             @@
##             main     #445      +/-   ##
==========================================
+ Coverage   56.96%   56.99%   +0.02%     
==========================================
  Files         266      266              
  Lines       27982    27982              
==========================================
+ Hits        15941    15949       +8     
+ Misses      12041    12033       -8     

see 5 files with indirect coverage changes