Removed color.__experimentalDuotone from core blocks

[sabbir1991]

What?

In this PR I removed the color.__experimentalDuotone from a few core blocks( Avatar, Cover, Post author, Post featured image, and Site logo blocks ) and added filter.duotone supports.

Why?

The block supports color.__experimentalDuotone has been deprecated in WordPress 6.3. Thats why I removed those deprecated code and added filter support.

Fixes issue: #58035

Testing Instructions

1. Open a post or page new/edit page.
2. Insert Avatar/Cover/Post author/Post featured image/Site logo blocks for testing.
3. Set the Duotone option from the toolbar or Sidebar color settings.
4. Need to check whether the color is reflected on the editor or not.

[github-actions]

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[t-hamano]

Hi @sabbir1991,

All the changes made in this PR look correct, but there are conflicts, could you rebase this PR?

Thank you for your efforts!

[github-actions]

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[sabbir1991]

Hi @t-hamano, I have rebased the changes with the latest trunk and updated the PR. Now this PR change is ready for review.

[t-hamano]

LGTM! Thanks for your work 👍