Share errors counter across components

[jotak]

• All errors can now be found from metric "errors_total"
• Use error name and exporter as labels

[codecov]

Codecov Report

Attention: Patch coverage is 82.60870% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 36.08%. Comparing base (9507ebf) to head (be61272).
Report is 1 commits behind head on main.

Files	Patch %	Lines
pkg/exporter/kafka_proto.go	0.00%	2 Missing ⚠️
pkg/agent/agent.go	0.00%	1 Missing ⚠️
pkg/exporter/grpc_proto.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #278      +/-   ##
==========================================
+ Coverage   35.90%   36.08%   +0.17%     
==========================================
  Files          42       42              
  Lines        3777     3786       +9     
==========================================
+ Hits         1356     1366      +10     
+ Misses       2343     2342       -1     
  Partials       78       78              

Flag	Coverage Δ
unittests	36.08% <82.60%> (+0.17%)	⬆️

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[msherif1234]

/lgtm

[jotak]

/approve
thx

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jotak

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• OWNERS [jotak]

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