fix(grafana_notification_channel): deprecation

[Nemental]

SUMMARY

• Fixes integration test workflows for Grafana v11 coming with Bump Grafana versions #377
• Deprecate module grafana_notification_channel (legacy alerting removed with Grafana v11)

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

ADDITIONAL INFORMATION

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.91%. Comparing base (fff9558) to head (9f94c10).
Report is 13 commits behind head on main.

❗ Current head 9f94c10 differs from pull request most recent head 4557305

Please upload reports for the commit 4557305 to get more accurate results.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #382       +/-   ##
===========================================
+ Coverage   45.63%   63.91%   +18.28%     
===========================================
  Files          21       16        -5     
  Lines        2220     1735      -485     
  Branches      433      369       -64     
===========================================
+ Hits         1013     1109       +96     
+ Misses       1167      454      -713     
- Partials       40      172      +132     

Flag	Coverage Δ
integration	70.42% <ø> (?)
sanity	23.45% <ø> (+0.05%)	⬆️
units	?

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