fix: assert delivery test

[atanmarko]

Description

Fix assert delivery test.
Move check_certificate_delivery to test sdk crate.

Fixes TP-767

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

Attention: 31 lines in your changes are missing coverage. Please review.

Comparison is base (74babd1) 59.84% compared to head (a17ddff) 60.42%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #350      +/-   ##
==========================================
+ Coverage   59.84%   60.42%   +0.57%     
==========================================
  Files         230      230              
  Lines       11985    12013      +28     
==========================================
+ Hits         7173     7259      +86     
+ Misses       4812     4754      -58     

Files	Coverage Δ
crates/topos-test-sdk/src/lib.rs	0.00% <ø> (ø)
crates/topos/tests/push-certificate.rs	100.00% <ø> (ø)
crates/topos/src/components/tce/mod.rs	15.74% <0.00%> (+0.24%)	⬆️
...os/src/components/tce/services/push_certificate.rs	58.38% <38.29%> (+58.38%)	⬆️

... and 6 files with indirect coverage changes

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