Change "Swap" to "Replace" for Template Action

[karthick-murugan]

What?

Fixes #56845
Updates the UI text from "Swap template" to "Replace template" for consistency across Gutenberg and to align with similar actions in the interface.

Why?

The word "replace" is commonly used in action items throughout the Gutenberg editor (e.g., replacing template parts). Using "swap" creates an inconsistency in terminology and could cause confusion.

Aligning this action with the existing terminology improves clarity and enhances the user experience by providing a consistent language framework.

How?

Replaced occurrences of "Swap template" with "Replace template" in the UI.

Testing Instructions

1. Go to the Site Editor.
2. Select Pages and click on a page to edit.
3. Open the Templates dropdown on the right-hand side of the screen.
4. Verify that the action labeled "Swap template" is now labeled "Replace template".
5. Click on the "Replace template" option and confirm that it functions as expected, with no changes to behaviour.

Testing Instructions for Keyboard

Screenshots or screencast

Before

After

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Co-authored-by: karthick-murugan <[email protected]>
Co-authored-by: annezazu <[email protected]>
Co-authored-by: richtabor <[email protected]>

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[karthick-murugan]

@bgardner - Please have a look at this PR when you get some time.

[bgardner]

@karthick-murugan Looks good to me Just tested with Playground and works as expected.

[karthick-murugan]

@richtabor , @annezazu - Updated this PR with all necessary changes and fixed the End to End tests issues as well. Please review this PR when you get some time.

[annezazu]

Thanks for pinging. I'd drop this into #core-editor to get more reviews in WordPress.org slack! In quickly testing, this worked for me.

[karthick-murugan]

Thanks for pinging. I'd drop this into #core-editor to get more reviews in WordPress.org slack! In quickly testing, this worked for me.

@annezazu - Thanks for the review. Looking forward to it.