feat: adds attachment rename & replace

[abaicus]

All Submissions:

• Have you followed the Optimole Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

• Adds rename / replace attachment fields in the single attachment edit view;
• Automatically replaces DB links for the main URL and image sizes, including -scaled suffixed images;
• DAM Imported & Offloaded images do not have this feature;
• Attachment files can only be replaced with other files that have the same mime-type;
• Automatically clears Elementor & Otter blocks cache and CSS files when a rename / replace is done;

Initial state:

Replacement filled:

Closes Codeinwp/optimole-service#1163.

How to test the changes in this Pull Request:

I suggest testing with multiple attachment file types that are supported by WordPress.

1. Upload an attachment;
2. Go to its' single edit page;
3. You should see both the rename and replace field;
4. These fields should work as expected;
5. Names should automatically be sanitized to a valid version;
6. When renaming or replacing an attachment, all of its links should be updated in the content;
   • This includes CSS generated files, customizer settings, post meta, etc;
7. Offloaded attachments and dam-imported ones should not have these fields available;

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully ran tests with your changes locally?

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[selul]

Looking great 🍾