Fix bug where environment variables for an emulated function did not consider emulators running remotely.

[taeold]

#5079 refactored the way to set environment variables on Functions Emulator. As implemented, the refactored function does not consider "remote" emulators i.e. emulator started by another instance of emulators:start command. This broke users who relies this to connect functions:shell command to the remote emulators.

Fixes #5225

[codecov-commenter]

Codecov Report

Base: 56.27% // Head: 56.25% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (4aaf45b) compared to base (e984a6c).
Patch coverage: 10.34% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5269      +/-   ##
==========================================
- Coverage   56.27%   56.25%   -0.02%     
==========================================
  Files         309      309              
  Lines       20820    20825       +5     
  Branches     4224     4219       -5     
==========================================
  Hits        11716    11716              
- Misses       8092     8097       +5     
  Partials     1012     1012              

Impacted Files	Coverage Δ
src/emulator/commandUtils.ts	27.87% <0.00%> (-0.13%)	⬇️
src/emulator/functionsEmulator.ts	7.05% <0.00%> (-0.04%)	⬇️
src/emulator/env.ts	16.66% <13.04%> (-0.73%)	⬇️

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