Fix: Click-through blur effect when gallery images have a caption.

[Rishit30G]

What?

Closes #69061

Why?

This PR is intended to resolve the issue which makes the blur effect block the image click

How?

This PR makes the following changes to the SCSS file:

pointer-events: none;
cursor: pointer;

This will help the cursor to appear on the blur part of the image and it will be clickable as well

Testing Instructions

• Create a new post
• Add a new gallery block
• Add some images to the gallery block
• Add caption to the images
• Notice the images in the frontend
• Notice that large part of the area above the caption is now clickable, previously it was not

Screenshots or screencast

Before	After
https://github.com/user-attachments/assets/3b9bca6f-63ec-4f9e-9d9c-e3538f2e413a	https://github.com/user-attachments/assets/a42643fa-bb90-497d-8c74-5e3d3cda3c1c

PS: Sorry for the bad screen recording, my laptop's screen recorder wasn't able to show the cursor: pointer behaviour so had to rely on phone for recording 😓

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