Global Styles - Product Title - fix styles application

[kmanijak]

Steps to reproduce

1. Go to Editor
2. Add Products block
3. Add Product Title block as an inner block if not already included
4. Make sure "Make title a link" is enabled
5. Open Global Styles and change the following styles:

Typography - Text

• Appearance
  Expected: Assuming the Product Title is a link it should not influence it
  Actual: Only italic is applied, font weight doesn't change

Typography - Links

• Font
  Expected: Applied in editor and frontend
  Actual: Applied only in editor (frontend doesn't reflect the change)

Typography - Headings

• Font
• Size
• Line height
  Expected: Applied
  Actual: Not applied
• Appearance
  Expected: Appearance is applied
  Actual: Only italic is applied, font weight doesn't change

Colors - Headings

• Headings
  Expected: Both background color and text color applies
  Actual: Only background color works

⚠️ Remember

• Check all of the above in Editor and Frontend!
• Styles composition may be fragile and the issue may evolve. Please check if block reacts to all the other Global Styles
• For items we are inheriting from Gutenberg that seem inconsistent and/or have room for improvement, we should raise an upstream Issue or PR and avoid making localized changes that bring inconsistency with Gutenberg.
• Reflect the newest state of styles support in the Spreadsheet after finishing this task

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Note: Technically speaking the Product Title is a heading (H3 by default), so should react to Typography Headings settings. All the expected states above are based on this assumption, however if you think it should not work that way, please update the steps and/or consult with others.