feat(agent): Add AWS Lambda Relationship

[ZNeumann]

Instrument AWS Lambda invoke and reconstruct the ARN to facilitate a complete service map.

[newrelic-php-agent-bot]

Test Suite	Status	Result
Multiverse	✅	8/8 passing
SOAK	❌	77/79 passing

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.87719% with 56 lines in your changes missing coverage. Please review.

Project coverage is 77.82%. Comparing base (f02c410) to head (fbf408f).

Files with missing lines	Patch %	Lines
agent/lib_aws_sdk_php.c	49.00%	51 Missing ⚠️
agent/php_nrini.c	70.00%	3 Missing ⚠️
axiom/nr_segment_traces.c	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1023      +/-   ##
==========================================
- Coverage   77.93%   77.82%   -0.12%     
==========================================
  Files         198      198              
  Lines       27713    27827     +114     
==========================================
+ Hits        21599    21657      +58     
- Misses       6114     6170      +56     

Flag	Coverage Δ
agent-for-php-7.2	78.08% <61.53%> (-0.01%)	⬇️
agent-for-php-7.3	78.10% <61.53%> (-0.01%)	⬇️
agent-for-php-7.4	77.81% <61.53%> (-0.01%)	⬇️
agent-for-php-8.0	77.20% <61.53%> (-0.01%)	⬇️
agent-for-php-8.1	77.59% <50.87%> (-0.12%)	⬇️
agent-for-php-8.2	?
agent-for-php-8.3	?
agent-for-php-8.4	77.22% <50.87%> (-0.12%)	⬇️

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