feat: verify that at least one element of an iterator/collection satisfies assertions

[haraldmaida]

We have the assertion method each_element, which verifies that all elements of a collection or an iterator satisfy given assertions.
It is handy to have an additional method, that verifies that at least one element of a collectionn or an iterator satisfies given assertions.

Provide new method any_element to perform assertions an every element of a collection or an iterator. The assertion succeeds if at least one element of the collection or iterator satisfies the given assertions.

[codecov]

Codecov Report

❌ Patch coverage is 92.68293% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.89%. Comparing base (759c1fa) to head (7aef5d8).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/spec/mod.rs	92.68%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #73      +/-   ##
==========================================
- Coverage   93.90%   93.89%   -0.02%     
==========================================
  Files          32       32              
  Lines        4674     4714      +40     
  Branches     4674     4714      +40     
==========================================
+ Hits         4389     4426      +37     
- Misses        246      248       +2     
- Partials       39       40       +1     

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