fix(datasource-metrics): update metric name to show datasource details

[michael-wirth]

Closes #4074

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.26%. Comparing base (4f9d0ae) to head (f9a3080).
Report is 2072 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #4076      +/-   ##
============================================
- Coverage     83.64%   82.26%   -1.39%     
+ Complexity     1247     1227      -20     
============================================
  Files           156      164       +8     
  Lines          3644     4132     +488     
  Branches        258      262       +4     
============================================
+ Hits           3048     3399     +351     
- Misses          464      611     +147     
+ Partials        132      122      -10     

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