Adds control for ErrorProvider on WinformsControlTest

[ricardobossan]

Related #10735

Proposed changes

• Adds new control to the ErrorProvider form on the WinformsControlTests project;
• Aims to test with scaling of multi-resolution icons on the ErrorProvider control.

Customer Impact

• None

Regression?

• No

Risk

• Minimal

Screenshots

Before

After

Test methodology

• Interactive test

Test environment(s)

• 9.0.100-alpha.1.23618.3

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

Attention: 57 lines in your changes are missing coverage. Please review.

Comparison is base (4e56c2a) 73.22507% compared to head (ad5654f) 73.22003%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #10847         +/-   ##
===================================================
- Coverage   73.22507%   73.22003%   -0.00505%     
===================================================
  Files           3071        3071                 
  Lines         633096      633141         +45     
  Branches       47388       47389          +1     
===================================================
+ Hits          463585      463586          +1     
- Misses        165970      166013         +43     
- Partials        3541        3542          +1     

Flag	Coverage Δ
Debug	73.22003% <0.00000%> (-0.00505%)	⬇️
integration	18.30982% <ø> (-0.00387%)	⬇️
production	46.72507% <ø> (+0.00140%)	⬆️
test	94.99622% <0.00000%> (-0.01316%)	⬇️
unit	43.65109% <ø> (+0.00140%)	⬆️

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[lonitra]

LGTM