Skip EDID test if there's no desktop session running (BugFix)

[p-gentili]

Description

The Zapper EDID job is only checking resources on the Zapper side, not on the DUT. This means the testcase runs on server images as well, failing.

This PR propose a new resource job, desktop_session, which is used by the EDID job to make sure it runs only on desktop.

WARNING: This modifies com.canonical.certification::sru

Resolved issues

N/A

Documentation

N/A

Tests

• Added unit test file
  Tested on https://certification.canonical.com/hardware/202406-34144
  Current outcome:

Current host is not supported.

Side-loading the provider:

-----------------------------[ Running job 4 / 5 ]------------------------------
------[ Check whether a desktop session is available and of which type. ]-------
ID: com.canonical.certification::desktop_session
Category: Informational tests
--------------------------------------------------------------------------------
desktop_session: False
session_type: None
--------------------------------------------------------------------------------
Outcome: job passed
-----------------------------[ Running job 5 / 5 ]------------------------------
---[ Check if the system automatically changes the resolution based on EDID ]---
ID: com.canonical.certification::monitor/zapper-edid
Category: Monitor tests
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Outcome: job cannot be started

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 45.19%. Comparing base (fd17448) to head (f4c9725).
Report is 121 commits behind head on main.

Files with missing lines	Patch %	Lines
providers/base/bin/desktop_session.py	91.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1404   +/-   ##
=======================================
  Coverage   45.18%   45.19%           
=======================================
  Files         366      367    +1     
  Lines       39102    39118   +16     
  Branches     6609     6612    +3     
=======================================
+ Hits        17669    17680   +11     
- Misses      20760    20764    +4     
- Partials      673      674    +1     

Flag	Coverage Δ
provider-base	18.71% <91.66%> (+0.05%)	⬆️

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[Hook25]

+1, LGTM