Config: Add TELEMETRY_URL support for telemetry configuration

[pbennett]

This commit introduces the TELEMETRY_URL environment variable to specify a custom endpoint for telemetry reporting when TELEMETRY_NAME is set. The README has been updated with details, and the run.sh script now handles configuring the telemetry endpoint if the variable is provided.

Summary

Nodely now offers a telemetry service for node runners, but to use, you must change the telemetry endpoint. This change adds a new env. val that can be set to override the telemetry endpoint without having to mount a custom logging.config.
Setting both TELEMETRY_NAME and TELEMETRY_URL is necessary to enable.

Test Plan

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.85%. Comparing base (a81d54f) to head (667cbe6).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6237      +/-   ##
==========================================
+ Coverage   51.83%   51.85%   +0.01%     
==========================================
  Files         643      643              
  Lines       86382    86382              
==========================================
+ Hits        44780    44795      +15     
+ Misses      38735    38724      -11     
+ Partials     2867     2863       -4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[gmalouf]

@pbennett have you build a binary from this branch yourself with the config override?

[pbennett]

@pbennett have you build a binary from this branch yourself with the config override?

I'd planned to but my pipelines all switched some time back to using the algorand image and it would take some work to do so. The change is so trivial though it feels pretty safe?

[pbennett]

Tagging @urtho for a look.