[release/10.0] Handle unterminated string data in DataObject

[github-actions]

Backport of #13949 to release/10.0

/cc @JeremyKuhne

Customer Impact

Corrupted clipboard data can cause application crashes when attempting to retrieve the data. There is no workaround in some cases as crashes can cause an access violation.

Testing

Unit tests added to cover bad HGLOBAL state.

Risk

Low, adding guards for corrupted state.

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

❌ Patch coverage is 73.21429% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.10003%. Comparing base (93e65c0) to head (c7feeb3).
⚠️ Report is 1 commits behind head on release/10.0.

Additional details and impacted files

@@                  Coverage Diff                   @@
##           release/10.0      #13988         +/-   ##
======================================================
- Coverage      77.10159%   77.10003%   -0.00156%     
======================================================
  Files              3273        3273                 
  Lines            644940      644979         +39     
  Branches          47692       47701          +9     
======================================================
+ Hits             497259      497279         +20     
- Misses           144013      144025         +12     
- Partials           3668        3675          +7     

Flag	Coverage Δ
Debug	77.10003% <73.21429%> (-0.00156%)	⬇️
integration	18.98432% <3.22581%> (-0.00786%)	⬇️
production	51.91538% <77.41935%> (+0.00122%)	⬆️
test	97.40958% <68.00000%> (-0.00298%)	⬇️
unit	49.33561% <77.41935%> (+0.00527%)	⬆️

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