chore(agent): add suggest package function to Magento

[hahuja2]

This PR adds the nr_txn_suggest_package_supportability_metric function to Magento.

[newrelic-php-agent-bot]

Test Suite	Status	Result
Multiverse	❌	6/8 passing
SOAK	❌	78/79 passing

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.22%. Comparing base (b00dcc3) to head (e1ef8d3).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1047   +/-   ##
=======================================
  Coverage   77.22%   77.22%           
=======================================
  Files         198      198           
  Lines       27899    27900    +1     
=======================================
+ Hits        21544    21545    +1     
  Misses       6355     6355           

Flag	Coverage Δ
agent-for-php-7.2	77.44% <100.00%> (+<0.01%)	⬆️
agent-for-php-7.3	77.46% <100.00%> (+<0.01%)	⬆️
agent-for-php-7.4	77.18% <100.00%> (+<0.01%)	⬆️
agent-for-php-8.0	76.57% <100.00%> (+<0.01%)	⬆️
agent-for-php-8.1	76.97% <100.00%> (+<0.01%)	⬆️
agent-for-php-8.2	76.58% <100.00%> (+<0.01%)	⬆️
agent-for-php-8.3	76.58% <100.00%> (+<0.01%)	⬆️
agent-for-php-8.4	76.60% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.