Datatable should emit the restored multiSortMeta on a reload

[Aspyryan]

When sorting in a stateful grid, it stores it in localstorage, but on a reload of the page or component, this state get's re-added to the internal component value but not emitted by the multiSortMeta model state. This should be added one way or another.

primevue/packages/primevue/src/datatable/DataTable.vue

Lines 1743 to 1745 in dcd66c1

	if (restoredState.multiSortMeta) {
	this.d_multiSortMeta = restoredState.multiSortMeta;
	}

We use a temp fix like this:

	// Get multiSortMeta from localstorage here since primevue issue #6325
	const localState = localStorage.getItem(stateKey.value!);
	if (localState) {
		const stateObject = JSON.parse(localState);
		if (stateObject.multiSortMeta.length > 0) {
			multiSortMeta.value = stateObject.multiSortMeta;
		}
	}

[EwenDC]

Also applies to the first, rows, sortField, and sortOrder props