Upgrade photoswipe and remove vendoring

[rutwikhdev]

Current version is 9 years old and some features like zoom, load more don't event work.

Error logs:

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'getBoundingClientRect')
    at image_view.js:235:17
    at Array.map (<anonymous>)
    at image_view.js:223:29
    at new Promise (<anonymous>)
    at frappe.views.GalleryView.prepare_pswp_items (image_view.js:222:10)
    at image_view.js:49:18
    at Rt (jquery.js:3479:29)
    at di (jquery.js:3547:12)
    at r (helpers.ts:98:1)

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'firstChild')
    at Object.getChildByClass (<anonymous>:66:23)
    at PhotoSwipe.init (<anonymous>:825:30)
    at frappe.views.GalleryView._show (image_view.js:287:13)
    at image_view.js:253:72