Normalize CGLIB proxied class names

[jtduffy]

Resolves #1574

With this change, transaction names that are composed of class name + method name from a controller that has a CGLIB proxy generated will no longer show the proxy class name but the original class name. This image shows an example of transactions names with and without this change:

[codecov-commenter]

Codecov Report

Merging #1575 (9b094ae) into main (f6b467b) will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##               main    #1575      +/-   ##
============================================
- Coverage     70.61%   70.59%   -0.03%     
+ Complexity     9798     9796       -2     
============================================
  Files           817      817              
  Lines         39501    39504       +3     
  Branches       5999     6000       +1     
============================================
- Hits          27892    27886       -6     
- Misses         8901     8909       +8     
- Partials       2708     2709       +1     

Files	Coverage Δ
...tcuts/frameworks/spring/MethodInvokerPointCut.java	0.00% <0.00%> (ø)

... and 6 files with indirect coverage changes

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