fix: Update Profiler to check whether Azure function mode support is enabled

[tippmar-nr]

Updates the Profiler to inspect the NEW_RELIC_AZURE_FUNCTION_MODE_ENABLED environment variable.

If the variable doesn't exist, we don't exclude any Azure function processes from instrumentation, which matches behavior prior to implementing Azure function support.

If the variable does exist, Azure function mode is only enabled if the variable has a value of 1 or true.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 90.90909% with 1 line in your changes missing coverage. Please review.

Project coverage is 81.24%. Comparing base (7c241f8) to head (4093edf).

Files with missing lines	Patch %	Lines
...nt/NewRelic/Profiler/Configuration/Configuration.h	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2822      +/-   ##
==========================================
+ Coverage   81.21%   81.24%   +0.02%     
==========================================
  Files         460      460              
  Lines       29219    29225       +6     
  Branches     3223     3223              
==========================================
+ Hits        23731    23743      +12     
+ Misses       4701     4697       -4     
+ Partials      787      785       -2     

Flag	Coverage Δ
Agent	82.26% <ø> (+0.02%)	⬆️
Profiler	72.17% <90.90%> (+0.05%)	⬆️

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

Files with missing lines	Coverage Δ
...nt/NewRelic/Profiler/Configuration/Configuration.h	77.25% <90.90%> (+0.43%)	⬆️

... and 1 file with indirect coverage changes