ci: fixing issues around Standards check

[michalChrobot]

Purpose of this PR

The Standards Check CI job was failing on formatting that could not be reproduced or fixed locally (EXAMPLE). Investigation found 2 independent causes:

1. Unpinned .NET SDK. The job runs dotnet format, whose Roslyn formatter behaves differently across SDK feature bands (e.g. 10.0.2xx vs 10.0.3xx). CI and local machines floated to whatever SDK was installed, so the same code formatted differently in each place.
2. No easy local fix path. Reproducing CI requires a matching installed editor + SyncSolution (so the generated .csproj reference paths resolve) and the right SDK. Without a complete editor install the style pass silently loads no references and reports a false "no issues", while stale .csproj HintPaths (pointing at an uninstalled editor) produce Required references did not load.

Changes

1. I aligned all our projects to one "minimal supported" editor
2. I added more description to standards job log
3. I corrected package.json handling to account for changes from 3.x branch

Jira ticket

N/A

Documentation

N/A

Testing & QA (How your changes can be verified during release Playtest)

Tested olocally

Backports

N/A

[michalChrobot]

I could also just automatically push fixes via usual Standards job but then devs wouldn't have control over it. I guess there may be some cases where you wouldn't want to push everything as the job says?

[michalChrobot]

Removed across projects as this version was deprecated (+ I don't think we need this package)

[michalChrobot]

Example results of queued job are in 9134d7e

[codecov-github-com]

Codecov Report

All modified and coverable lines are covered by tests ✅

@@                Coverage Diff                @@
##           develop-2.0.0    #4089      +/-   ##
=================================================
+ Coverage          66.39%   66.45%   +0.06%     
=================================================
  Files                163      163              
  Lines              24999    24999              
=================================================
+ Hits               16597    16614      +17     
+ Misses              8402     8385      -17     

Flag	Coverage Δ
NGOv2_ubuntu_6000.3	66.45% <ø> (+0.06%)	⬆️

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

see 4 files with indirect coverage changes

Components	Coverage Δ
com.unity.netcode.gameobjects	66.45% <ø> (+0.06%)	⬆️

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