Fix #1635 - discard device sync if its modelid is not provided

[kbeaugrand]

Description

What's new?

• Fix Bug: SyncDevices failed when modelId is not present on the tags #1635

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Tests
• Other

[codecov]

Codecov Report

Base: 90.04% // Head: 90.09% // Increases project coverage by +0.04% 🎉

Coverage data is based on head (7df6d3b) compared to base (b210968).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1636      +/-   ##
==========================================
+ Coverage   90.04%   90.09%   +0.04%     
==========================================
  Files         268      268              
  Lines        8834     8838       +4     
==========================================
+ Hits         7955     7963       +8     
+ Misses        879      875       -4     

Impacted Files	Coverage Δ
...c/AzureIoTHub.Portal.Server/Jobs/SyncDevicesJob.cs	97.14% <100.00%> (+4.07%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.