feat: improve observability for load balancer

[sduranc]

Description

• It sends a trace from the deployment pipeline to our centralized grafana
• Will generate metrics from endpoints that nginx serves

Related Issue(s)

• #{issue number}

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)
• Relevant automated test added (if you find this hard, leave it and we'll help out)

Documentation

• User documentation is updated with a separate linked PR in altinn-studio-docs. (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.20%. Comparing base (22337dc) to head (c9881e9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #14003   +/-   ##
=======================================
  Coverage   95.20%   95.20%           
=======================================
  Files        1740     1740           
  Lines       22815    22815           
  Branches     2670     2670           
=======================================
  Hits        21722    21722           
  Misses        847      847           
  Partials      246      246           

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