Introduce VISP_HAVE_PCL_VERSION macro in vpConfig.h

[fspindle]

• Checking for PCL version using PCL_VERSION_COMPARE provided by PCL in pcl/pcl_config.h like #if PCL_VERSION_COMPARE(>=, 1, 7, 2) allows to build ViSP libraries but not the Python bindings.
  There is the following error:

  Successfully installed visp_python_bindgen-0.0.1
   18%|████████████████████████████████▎                                               | 68/373   [00:04<00:09, 32.93hdr/s]
  bindings/src/tmp/vpImageConvert.h.in:353 error: Could not evaluate expression due to SyntaxError("around token '>=' type CPP_GREATEREQUAL") (passed to evaluator: 'PCL_VERSION_COMPARE(>=,1,14,1)')
  bindings/src/tmp/vpImageConvert.h.in:396 error: Could not evaluate expression due to SyntaxError("around token '>=' type CPP_GREATEREQUAL") (passed to evaluator: 'PCL_VERSION_COMPARE(>=,1,14,1)')
  

• Using instead VISP_HAVE_PCL_VERSION defined in vpConfig.h does the trick (like for OpenCV, Ogre, libfranka...)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.93%. Comparing base (75c4d90) to head (253f151).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1828      +/-   ##
==========================================
+ Coverage   47.91%   47.93%   +0.01%     
==========================================
  Files         531      531              
  Lines       68596    68596              
  Branches    31985    31985              
==========================================
+ Hits        32866    32879      +13     
+ Misses      31748    25374    -6374     
- Partials     3982    10343    +6361     

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