[LiveComponent] Non-writeable props that are exposed in the URL should not be added to the URL after an action

[jannes-io]

Scenario: We want a component where a property is passable through the URL, but is not included in the URL when actions are performed on the component.

So we create this component, expecting that if a prop isn't writeable, it should never be set in the URL unless we generate the URL for the user with that parameter included:

#[AsLiveComponent]
class MyComponent
{
    use DefaultActionTrait;

    #[LiveProp(writable: true, url: true)]
    public string $prop1;

    #[LiveProp(url: true)]
    public string $prop2 = 'default';

    #[LiveAction]
    public function doAction() {  /* not important */ }
}

Navigate to: /?prop1=hello

Perform the doAction

Current: the url updated to /?prop1=hello&prop2=default
Expected: the url remains /?prop1=hello

Workaround:
Mount a secondary custom stimulus controller on the live controller and remove the param again every time it updates. Sure, this works for a single component, but isn't a generic solution that can be applied to all parameters since we don't know about writability or even default values of the props in this controller.

[jannes-io]

After thinking about it, writability probably has nothing to do with it.

So would it be better as a feature? With the requirements being if the current value of a property is the same as the default value, or initial value on first render, do not include it in the URL parameters? It's mostly just for aesthetic reasons to keep the URL params limited to only the values that have changed.

[jannes-io]

Duplicate of #2141