Fix parsing of the git tag with new ViSP tag naming

[s-trinh]

Before:

more ViSP-third-party.txt 

==========================================================
General configuration information for ViSP 3.6.1

  Version control:               3.2.0-3608-gcef7d8d0e

Now:

more ViSP-third-party.txt 

==========================================================
General configuration information for ViSP 3.6.1

  Version control:               v3.6.0-789-g0a12cf235

---

git describe --tags --always --dirty
v3.6.0-788-gcef7d8d0e

git describe --tags --always --dirty --match "[0-9].[0-9].[0-9]*"
3.2.0-3608-gcef7d8d0e

git describe --tags --always --dirty --match "v[0-9].[0-9].[0-9]*"
v3.6.0-788-gcef7d8d0e

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.63%. Comparing base (1675840) to head (0a12cf2).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1372   +/-   ##
=======================================
  Coverage   45.63%   45.63%           
=======================================
  Files        1069     1069           
  Lines      108080   108080           
  Branches    18710    18710           
=======================================
  Hits        49325    49325           
  Misses      58755    58755           

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[fspindle]

@s-trinh Thanks