🐛 [RUM-6226][rum-react] improve routes wildcard substitution

[BenoitZugmeyer]

Motivation

In #3023, we implemented wildcard substition in react-router paths. For example, on a route like /foo/*, a path /foo/bar would produce a view name /foo/bar.

It turns out we have an internal application which uses nested routes with wildcards, ex: { path: '*', children: [{ path: '*' }] }. This is probably not popular use case, but still, it exists. The issue with the previous implementation is that it duplicated the path in the view name (a path /foo would produce a view name /foo/foo).

Changes

This PR fixes this issue and consolidates the tests with more edge cases related to wildcards.

Testing

• Local
• Staging
• Unit
• End to end

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I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.52%. Comparing base (84a1fa1) to head (a8f6d04).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3105      +/-   ##
==========================================
- Coverage   93.63%   93.52%   -0.12%     
==========================================
  Files         276      276              
  Lines        7620     7625       +5     
  Branches     1711     1712       +1     
==========================================
- Hits         7135     7131       -4     
- Misses        485      494       +9     

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