Added machine_id to config_path and failure path of the agent

[chkeita]

Summary of the Pull Request

This is a continuation of #2671. The config_path and the failure_path needed to be updated to also include the machine_id to allow multiple agents to run on the machine.

closes #2670

[codecov-commenter]

Codecov Report

Merging #2731 (78b5799) into main (7482700) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #2731      +/-   ##
==========================================
- Coverage   29.10%   29.09%   -0.02%     
==========================================
  Files         321      321              
  Lines       38426    38440      +14     
==========================================
  Hits        11185    11185              
- Misses      27241    27255      +14     

Impacted Files	Coverage Δ
src/agent/onefuzz-agent/src/config.rs	0.00% <0.00%> (ø)
src/agent/onefuzz-agent/src/failure.rs	0.00% <0.00%> (ø)
src/agent/onefuzz-agent/src/main.rs	0.40% <0.00%> (-0.02%)	⬇️
src/agent/onefuzz-agent/src/panic.rs	0.00% <0.00%> (ø)
src/agent/onefuzz-agent/src/reboot.rs	0.00% <0.00%> (ø)

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