fix(ios): fix custom location provider add/remove

[mfazekas]

Closes: #3411

Screen.Recording.2024-03-09.at.17.17.53.mov

Example:

import React, { useRef, useEffect } from 'react';
import { Switch, View, Text } from 'react-native';
import {
  MapView,
  Camera,
  CustomLocationProvider,
  LocationPuck,
  Viewport,
} from '@rnmapbox/maps';

export default function BugReportExample() {
  const [location, setLocation] = React.useState([-74.00597, 40.71427]);
  const [useCustomLocation, setUseCustomLocation] = React.useState(false);
  useEffect(() => {
    const interval = setInterval(() => {
      setLocation((location) => [location[0] + 0.0001, location[1] + 0.0001]);
    }, 500);
    return () => clearInterval(interval);
  }, []);
  const viewportRef = useRef();

  return (
    <>
      <View style={{ flexDirection: 'row', alignItems: 'center' }}>
        <Text>Emulate Location</Text>
        <Switch
          value={useCustomLocation}
          onChange={() => setUseCustomLocation(!useCustomLocation)}
        />
      </View>

      <MapView
        style={{ flex: 1 }}
        onDidFinishLoadingStyle={() => {
          viewportRef.current.transitionTo(
            { kind: 'followPuck', zoom: 16 },
            { kind: 'default' },
          );
        }}
      >
        <Camera
          defaultSettings={{
            centerCoordinate: [-74.00597, 40.71427],
            zoomLevel: 14,
          }}
          followZoomLevel={14}
          followUserLocation={true}
        />
        <Viewport ref={viewportRef} />
        {useCustomLocation && <CustomLocationProvider coordinate={location} />}
        <LocationPuck visible={true} />
      </MapView>
    </>
  );
}