Fix race condition in reboot_check_test's renderer test and add lsusb/lspci timeout (BugFix)

[tomli380576]

Description

• Added a method to wait for graphical.target before running unity_support_test.
• Added timeouts for lspci and lsusb

Resolved issues

Race condition issue: #1631 TLDR: Calling unity_support_test before graphical.target is reached will falsely report the test as failed since it can't open the display.

There was also an issue reported by Hanhsuan where lspci and lsusb can get stuck and never return, so I added a timeout for their subprocess.run calls.

• By "stuck" I mean lspci & lsusb are waiting indefinitely for devices to respond, which apparently can happen with broken drivers.

Documentation

The wait timeout can be controlled by --graphical-target-timeout <timeout_seconds>. This value is ignored when -g or --graphics are not specified. Default is 120 seconds

Tests

Unit tests

[codecov]

Codecov Report

Attention: Patch coverage is 91.30435% with 2 lines in your changes missing coverage. Please review.

Project coverage is 49.02%. Comparing base (4305ba1) to head (60037af).
Report is 31 commits behind head on main.

Files with missing lines	Patch %	Lines
providers/base/bin/reboot_check_test.py	91.30%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1671      +/-   ##
==========================================
+ Coverage   48.99%   49.02%   +0.02%     
==========================================
  Files         372      372              
  Lines       40321    40341      +20     
  Branches     6811     6814       +3     
==========================================
+ Hits        19757    19777      +20     
  Misses      19842    19842              
  Partials      722      722              

Flag	Coverage Δ
provider-base	24.89% <91.30%> (+0.09%)	⬆️

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