Harden error handling when wms layers get map requests fails despite 200 ok

[MV88]

Description

There is a scenario where the get map returns an 200 ok with the xml content containing an exception.
In this case where headers are configured to use bearer token it will enter line 78 despite the content being an xml exception

MapStore2/web/client/components/map/openlayers/plugins/WMSLayer.js

Lines 72 to 87 in e0fbce0

	if (headers) {
	axios.get(newSrc, {
	headers,
	responseType: 'blob'
	}).then(response => {
	if (response.status === 200 && response.data) {
	image.getImage().src = URL.createObjectURL(response.data);
	} else {
	console.error("Status code: " + response.status);
	}
	}).catch(e => {
	console.error(e);
	});
	} else {
	img.src = newSrc;
	}

this must be handled making sure it will dispatch a layer load error entering line 314

MapStore2/web/client/components/map/openlayers/Layer.jsx

Lines 306 to 320 in e0fbce0

	imageLoadEndStream$
	.bufferWhen(() => imageStopStream$)
	.subscribe({
	next: (imageEvents) => {
	const errors = imageEvents.filter(e => e.type === 'imageloaderror');
	if (errors.length > 0) {
	this.props.onLayerLoad(options.id, {error: true});
	if (options && !options.hideErrors || !options) {
	this.props.onLayerError(options.id, imageEvents.length, errors.length);
	}
	} else {
	this.props.onLayerLoad(options.id);
	}
	}
	});

this should

How to reproduce

• this currently happens in a project and it require time to find a scenario to reproduce it in mapstore
• anyway, if a wms layers generate a wms error, (maybe for a style that is missing)
• it should generate this use case if not other ways have to be found

Expected Result

• to have dispatched the layer load error
• layers should stop rendering, should be hidden until an update to the view triggers an update of the layer so new requests comes in and a new check can be done

Current Result

nothing happens, layers remain rendered in the mapo

• Not browser related

Browser info

(use this site: https://www.whatsmybrowser.org/ for non expert users)

Browser Affected	Version
Internet Explorer
Edge
Chrome
Firefox
Safari

Other useful information