Add connection to NGINX One Console

[bjee19]

Proposed changes

Add connection to NGINX One Console by configuring Agent to sent telemetry data to NGINX One Console endpoint.

Problem: Users of NGF and NGINX One Console would like to see fleet management telemetry in their console.

Solution: Update NGINX Agent configuration to send telemetry data to NGINX One Console when a user specifies their data plane key secret.

Testing: Added unit tests and manually verified NGF metrics are sent to the NGINX One Console when using a staging endpoint.

Closes #3251

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

Enable connection to NGINX One Console.

[bjee19]

This PR is still a draft until i finish updating the objects_test.go and add tests for the agent_labels.go collector

[codecov]

Codecov Report

❌ Patch coverage is 89.56522% with 24 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.11%. Comparing base (316db99) to head (85dbd0b).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/controller/manager.go	0.00%	12 Missing ⚠️
cmd/gateway/commands.go	91.54%	6 Missing ⚠️
internal/controller/provisioner/handler.go	25.00%	2 Missing and 1 partial ⚠️
internal/controller/provisioner/provisioner.go	88.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3676      +/-   ##
==========================================
+ Coverage   87.05%   87.11%   +0.05%     
==========================================
  Files         127      128       +1     
  Lines       15604    15788     +184     
  Branches       62       62              
==========================================
+ Hits        13584    13753     +169     
- Misses       1861     1873      +12     
- Partials      159      162       +3     

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[sjberman]

Sidenote regarding documentation, be sure we update the cli-help doc for the new CLI flags.

[bjee19]

There are some weird tests included just to satisfy the codecov bot and I think thats the highest the coverage is getting since the remaining spots are already lacking coverage.

[sjberman]

Have you verified that if a user updates the source Secret, that key is propagated properly to the duplicate Secret?

[bjee19]

Have you verified that if a user updates the source Secret, that key is propagated properly to the duplicate Secret?

Yep just verified that.

[salonichf5]

lgtm 🚀 great work !