Fix test_trotter_is_used_if_num_steps_is_defined

[astralcai]

1. Add assert to qml.equal such that the test case actually tests something.
2. Fix the expected params for the decomposed gates.

[sc-66336]

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.67%. Comparing base (37bc2e6) to head (b5e8331).
Report is 244 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #5867    +/-   ##
========================================
  Coverage   99.66%   99.67%            
========================================
  Files         421      421            
  Lines       40466    40170   -296     
========================================
- Hits        40332    40040   -292     
+ Misses        134      130     -4     

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