Better handling of faulty unloading of appa

[helto4real]

Breaking change

Proposed change

We currently do not handle unloading of apps in a robust way, This PR makes this better by:

• Make sure we log if unloading/disposing apps takes more than 3 seconds
• Make disposing apps concurrent so non faulty apps get disposed correctly
• Make sure that if disposing of apps fails, new instances of apps will not be created
• Make sure we always log errors on disconnect

There are still a risk that the faulty blocking app could be initialized a second time on HA restart but not without it being logged at least. This require some more re-design and I will check this out in V4 of the runtime.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the [development checklist][dev-checklist]
• The code compiles without warnings (code quality chek)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

[codecov]

Codecov Report

Attention: 12 lines in your changes are missing coverage. Please review.

Comparison is base (e7b8487) 79.13% compared to head (ba22af9) 78.89%.

❗ Current head ba22af9 differs from pull request most recent head fbb1849. Consider uploading reports for the commit fbb1849 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #961      +/-   ##
==========================================
- Coverage   79.13%   78.89%   -0.25%     
==========================================
  Files         175      175              
  Lines        3485     3501      +16     
  Branches      449      449              
==========================================
+ Hits         2758     2762       +4     
- Misses        544      555      +11     
- Partials      183      184       +1     

Flag	Coverage Δ
unittests	78.89% <53.84%> (-0.25%)	⬇️

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

Files	Coverage Δ
...del/NetDaemon.AppModel/Internal/AppModelContext.cs	100.00% <100.00%> (ø)
...ppModel/NetDaemon.AppModel/Internal/Application.cs	85.29% <60.00%> (-7.93%)	⬇️
...ime/NetDaemon.Runtime/Internal/NetDaemonRuntime.cs	70.21% <25.00%> (-4.50%)	⬇️

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