Add Webhook URI in latency metric of the outbound sender

[chaitanyasingla-dt]

There has been an addition in caduceus to track latency metrics for outbound senders.

Scenario:
Let's suppose we have multiple webhooks getting tracked and only one of them is increasing the latency of the request. If all the webhooks latency metric is getting tracked under the same name that is code = strconv.Itoa(resp.StatusCode), we will not be able to identify the source of the increase in latency of the requests.

Solution:
This pull request adds Webhook URI to the latency metric to identify the source of the increase in the latency of the requests.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.66%. Comparing base (6241ccb) to head (c6ba0cc).
Report is 108 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #323      +/-   ##
==========================================
+ Coverage   66.58%   66.66%   +0.07%     
==========================================
  Files          10       10              
  Lines        1293     1296       +3     
==========================================
+ Hits          861      864       +3     
  Misses        403      403              
  Partials       29       29              

Flag	Coverage Δ
unittests	66.66% <100.00%> (+0.07%)	⬆️

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[denopink]

work completed in #461 , the duration metric will now have a url label