feat(agent): properly handle idle laravel queue workers

[hahuja2]

This PR ensures idle laravel queue workers are properly handled by ending the current transaction and starting a new one.

[newrelic-php-agent-bot]

Test Suite	Status	Result
Multiverse	❌	13/16 passing
SOAK	❌	87/89 passing

[codecov-commenter]

Codecov Report

❌ Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.43%. Comparing base (be8c5c1) to head (17cf177).
⚠️ Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
agent/fw_laravel.c	20.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1126      +/-   ##
==========================================
- Coverage   78.44%   78.43%   -0.02%     
==========================================
  Files         193      193              
  Lines       28059    28064       +5     
==========================================
+ Hits        22012    22013       +1     
- Misses       6047     6051       +4     

Flag	Coverage Δ
agent-for-php-7.2	78.39% <0.00%> (-0.02%)	⬇️
agent-for-php-7.3	78.41% <0.00%> (-0.02%)	⬇️
agent-for-php-7.4	78.27% <0.00%> (-0.02%)	⬇️
agent-for-php-8.0	77.79% <20.00%> (-0.02%)	⬇️
agent-for-php-8.1	78.10% <20.00%> (-0.02%)	⬇️
agent-for-php-8.2	77.71% <20.00%> (-0.02%)	⬇️
agent-for-php-8.3	77.71% <20.00%> (-0.02%)	⬇️
agent-for-php-8.4	77.73% <20.00%> (-0.02%)	⬇️

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