[MRG] Limit C-MOVE and C-GET to 65535 suboperations

[scaramallion]

Reference issue

Closes #982

Tasks

• Unit tests added that reproduce issue or prove feature is working
• Fix or feature added
• Documentation and examples updated (if relevant)
• Unit tests passing and coverage at 100% after adding fix/feature
• Type annotations updated and passing with mypy

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (37ccf38) to head (ba13905).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #983   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           28        28           
  Lines         8707      8709    +2     
=========================================
+ Hits          8707      8709    +2     

Files with missing lines	Coverage Δ
pynetdicom/service_class.py	100.00% <100.00%> (ø)

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