adding multihop functional tests, some optimizations to helper class

[mozrokafor]

Description

added multihop connectivity functional tests

Reference

[i.e Jira or Github issue URL](https://mozilla-hub.atlassian.net/browse/PSP-493)

Checklist

• [x] My code follows the style guidelines for this project
• [x] I have not added any packages that contain high risk or unknown licenses (GPL, LGPL, MPL, etc. consult with DevOps if in question)
• [x] I have performed a self review of my own code
• [x] I have commented my code PARTICULARLY in hard to understand areas
• [ ] I have added thorough tests where needed

[codecov-commenter]

Codecov Report

Base: 29.11% // Head: 70.35% // Increases project coverage by +41.24% :tada:

Coverage data is based on head (eda0cbe) compared to base (19fa307). Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #4409       +/-   ##
===========================================
+ Coverage   29.11%   70.35%   +41.24%     
===========================================
  Files         227      256       +29     
  Lines       12582    16086     +3504     
  Branches     7120     8131     +1011     
===========================================
+ Hits         3663    11317     +7654     
- Misses       3730     4370      +640     
+ Partials     5189      399     -4790     

Flag	Coverage Δ
lottie_tests	56.33% <ø> (ø)
qml_tests	7.55% <ø> (-3.09%)	:arrow_down:
unit_tests	70.79% <ø> (+42.92%)	:arrow_up:

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

Impacted Files	Coverage Δ
src/filterproxymodel.h	50.00% <0.00%> (-50.00%)	:arrow_down:
src/statusicon.cpp	43.75% <0.00%> (-23.75%)	:arrow_down:
src/addons/addonmessage.h	81.81% <0.00%> (-18.19%)	:arrow_down:
src/addons/addonpropertylist.cpp	42.42% <0.00%> (-14.72%)	:arrow_down:
src/models/feature.h	22.22% <0.00%> (-11.12%)	:arrow_down:
src/composer/composer.cpp	47.16% <0.00%> (-5.22%)	:arrow_down:
tests/qml/mocmozillavpn.cpp	18.27% <0.00%> (-3.15%)	:arrow_down:
src/mozillavpn.h	35.00% <0.00%> (-1.37%)	:arrow_down:
src/constants.h	50.00% <0.00%> (ø)
src/controller.h	0.00% <0.00%> (ø)
... and 202 more

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