feat(agent): composer api package detection on by default

[bduranleau-nr]

Changes the default configuration value for composer-based package detection to true.

An additional configuration value, newrelic.vulnerability_management.composer_api.per_process_detection, has also been added to control the frequency at which composer sampling occurs. By default, this setting will be enabled, only sampling Composer API data once per php-fpm process. This improves baseline performance to make the enablement of Composer API package detection a negligible overhead impact.

[newrelic-php-agent-bot]

Test Suite	Status	Result
Multiverse	❌	0/8 passing
SOAK	❌	79/85 passing

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 76.92308% with 3 lines in your changes missing coverage. Please review.

Project coverage is 77.27%. Comparing base (ca08b5a) to head (a004604).

Files with missing lines	Patch %	Lines
agent/php_nrini.c	71.42%	2 Missing ⚠️
agent/php_execute.c	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1055   +/-   ##
=======================================
  Coverage   77.27%   77.27%           
=======================================
  Files         199      199           
  Lines       28329    28342   +13     
=======================================
+ Hits        21891    21902   +11     
- Misses       6438     6440    +2     

Flag	Coverage Δ
agent-for-php-7.2	77.47% <76.92%> (+<0.01%)	⬆️
agent-for-php-7.3	77.49% <76.92%> (+<0.01%)	⬆️
agent-for-php-7.4	77.36% <76.92%> (-0.01%)	⬇️
agent-for-php-8.0	76.56% <76.92%> (+<0.01%)	⬆️
agent-for-php-8.1	76.88% <76.92%> (+<0.01%)	⬆️
agent-for-php-8.2	76.50% <76.92%> (+<0.01%)	⬆️
agent-for-php-8.3	76.50% <76.92%> (+<0.01%)	⬆️
agent-for-php-8.4	76.52% <76.92%> (+<0.01%)	⬆️

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