[DpiUnaware] The icons of MenuStrip/ToolStrip/StatusStrip aren't scaling well on 300% system DPI

* .NET Core Version:
.NET SDK 7.0.100-alpha.1.21568.2

* Have you experienced this same bug with .NET Framework?:
Yes

**Problem description:**
All icons are very large than the text on High Dpi under DpiUnaware mode.

**Expected behavior:**
Icons should scale well.

**Minimal repro:**
1. Set system DPI to 300%.
2. Create a .NET Core WinForms project.
3. Add MenuStrip/ToolStrip/StatusStrip controls to Form.
4. Then insert standard items for MenuStrip/ToolStrip via clicking ‘Insert Standard Items’ in controls’ Tasks panel.
5. Add toolStripDropDownButton/toolStripSplitButton to StatusStrip control. Then change DisplayStyle property to ImageAndText.
6. Change the ApplicationHighDpiMode to DpiUnaware.
7. Run it.

**More info:**
1. This issue doesn't reproduce under PermonitorV2/SystemAware mode.
2. This issue doesn’t reproduce with following scenarios:
a. Create the sample project under 100% system DPI and close all opening designer, then zip it. – Non-HDPI environment.
[IconUnaware.zip](https://github.com/dotnet/winforms/files/7599875/IconUnaware.zip)
b. Set up another HDPI machine(300% DPI).
c. Extract the sample project created in step a.
d. Then run the project directly(F5 or start debugging).