Infinite scroll: URL updated on scroll when paused

### Impacted plugin

Jetpack

### Steps to Reproduce

1. Visit a website with infinite scroll enabled.
2. Open the developer tools console.
3. Pause infinite-scroll with the provided method `infiniteScroll.scroller.pause();`.
4. Change the browser URL with `history.pushState({}, 'About', './about');` or method of choice.
5. Scroll (browser URL will be reset).

### A clear and concise description of what you expected to happen.

Most functionality is in fact paused when using the provided `scroller.pause() method`.
For example, [the refresh method](https://github.com/Automattic/jetpack/blob/trunk/projects/plugins/jetpack/modules/infinite-scroll/infinity.js#L303) is paused since it has a check for `this.disabled` which the `infiniteScroll.scroller.pause();` sets.

Since infinite scroll is paused, the browser URL update should not occur when custom `history.pushState()` is used while it is paused and the custom browser URL should stay until `infiniteScroll.scroller.resume();` is called.

### What actually happened

While paused and custom code triggers `history.pushState()`, the URL gets updated/reset once any scroll action occurs.

### Browser

Google Chrome/Chromium, Mozilla Firefox, Apple Safari

### Other information

The source of the issue is here:
https://github.com/Automattic/jetpack/blob/a5df28bc939057e720557f6ee79892cb0c5eb20e/projects/plugins/jetpack/modules/infinite-scroll/infinity.js#L78-L88

Specifically the call to `self.determineURL();`

A possible solution would be to check for `this.disabled` before doing most of the things inside the `determineURL()` method, similar to what is done in the [.refresh() method](https://github.com/Automattic/jetpack/blob/a5df28bc939057e720557f6ee79892cb0c5eb20e/projects/plugins/jetpack/modules/infinite-scroll/infinity.js#L310-L313).

Example:
```js
Scroller.prototype.determineURL = function () {
var self = this,
pageNum = -1,
currentFullScreenState = fullscreenState(),
wrapperEls,
maxFactor = 0;

if ( this.disabled ) {
return;
}

// xor - check if the state has changed
if ( previousFullScrenState ^ currentFullScreenState ) {
```

Edited the [infinity.js source file](https://github.com/Automattic/jetpack/blob/trunk/projects/plugins/jetpack/modules/infinite-scroll/infinity.js) with that edit and works as expected.

## Use case
Trying to implement an "expand single article" from the infinite scroll temporarily with a preview. User engagement is to scroll to read the rest of the article. Once the article is no longer on screen, the scroller `.resume()` method is triggered so everything goes back to normal.

### Platform (Simple, Atomic, or both?)

_No response_

### Reproducibility

Consistent

### Severity

_No response_

### Available workarounds?

Yes, difficult/complicated to implement.

### Workaround details

One override that isn't too obvious is to toggle the property/setting `infiniteScroll.scroller.throttle` between false/true but it needs to be done inside the scroll event but through a callback so that `.removeEventListener()` can be used.
Example:
```js
const toggleScrollerThrottle = function () {
infiniteScroll.scroller.throttle = !infiniteScroll.scroller.throttle;
};

window.addEventListener('scroll', toggleScrollerThrottle);

// ... Do rest of code like history.pushState({}, 'About', './about');

window.removeEventListener('scroll', toggleScrollerThrottle);
```

Start in projects/plugins/jetpack/modules/infinite-scroll/infinity.js, especially the scroll handler around the linked determineURL() call and the disabled check in refresh(). Reproduce the issue with scroller.pause(), history.pushState(), and a scroll event. Done means the custom URL remains while paused and normal URL behavior resumes after scroller.resume().

Written by the indexing model from the issue text.